US20010014263A1 - Anti-galling nut assembly - Google Patents
Anti-galling nut assembly Download PDFInfo
- Publication number
- US20010014263A1 US20010014263A1 US09/753,989 US75398901A US2001014263A1 US 20010014263 A1 US20010014263 A1 US 20010014263A1 US 75398901 A US75398901 A US 75398901A US 2001014263 A1 US2001014263 A1 US 2001014263A1
- Authority
- US
- United States
- Prior art keywords
- nut
- nut assembly
- fastener
- galling
- insert
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 229910045601 alloy Inorganic materials 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 14
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 239000011651 chromium Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 7
- 239000011572 manganese Substances 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 12
- 239000010935 stainless steel Substances 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 description 14
- 238000000429 assembly Methods 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 229910000619 316 stainless steel Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
Definitions
- the torque required for rotation of the same stainless steel screws within the fastener insert formed from the nitrogen strengthened stainless steel alloys of the present invention were between 17% to 44% lower than the comparable standard tapped holes. Additionally the friction forces generated with an increase in the misalignment angle were significantly lower than the standard tapped holes. Perhaps most importantly, the required torque values for the fastener assemblies employing the inserts of the present invention were substantially uniform as compared to the standard. As such, the holding power of the screws from one application to the next should be relatively consistent.
- FIGS. 3 - 5 two fastener insert embodiments, namely free running inserts and locking inserts are shown.
- free running it is meant that the insert disposed within the nut barrel has a substantially symmetrical helical coil over its entire length, whereas a locking insert includes at least one unsymmetrical convolution 34 , usually including straight segments 36 as shown in FIG. 5.
- the nut 12 of nut assembly 10 which may be made on a conventional nut making machine and generally includes a barrel 20 of generally constant pitch and diameter throughout.
- the internal threads of the nut may be deformed at each end 38 and 38 A, respectively. By deforming the threads, this would further assure that the insert would not become disengaged from the nut, particularly during extreme or high torque applications.
Abstract
Described herein is a nut assembly including a nut and a fastener insert wherein at least one of the components is formed from a nitrogen strengthened stainless steel which is resistant to galling. In addition to reduced galling, fastener inserts formed from the nitrogen strengthened stainless steel exhibits good corrosion resistance and a yield strength which is almost twice that of fastener inserts formed from 304 type stainless steel.
Description
- This is a continuation-in-part of U.S. patent application Ser. No. 09/498,821, entitled “Anti-Galling Fastener Inserts”.
- The present invention relates to nut assemblies and, more particularly, to anti-galling nut assemblies including a nut and a fastener insert disposed within the nut for securing a threaded fastener.
- Nut assemblies come in a variety of shapes, sizes, designs and materials. Many nut assemblies include not only a fastener such as a bolt, pin or screw, but also will include a fastener insert to be positioned within the nut. One specific type of fastener insert useful in association with a threaded fastener is the helically coiled wire insert as described in U.S. Pat No. 2,672,070 entitled “Wire Coil Screw Thread Insert for Molded Material”, for example.
- Helically coiled fastener inserts generally do not exhibit staking, locking or swaging and does not require keying in place, which tends to greatly reduce stress which would otherwise be transferred to the nut. While such helically coiled wire inserts are generally useful as anchoring mechanisms for threaded fasteners in order to be used in high strength applications, such inserts must be formed from high strength materials. Heretofore, 302/304 stainless steels have been used to manufacture fastener inserts.
- Due to the intimate connection between the threads of the fastener and the insert, shearing forces are exerted on the fastener insert upon attachment of the fastener. As a result of the shearing forces, fastener inserts formed from 302/304 type stainless steels have exhibited a propensity to galling despite such stainless steels being considered among the hardest in the industry.
- Although galling and wear may occur under similar conditions, the types of deterioration involved are not similar. Galling occurs as a result of movements occurring along a metal-to-metal contact in a localized area which results in grooving and self-welding of the metals at the localized areas. This, in turn, leads to seizure of the metal parts.
- On the other hand, wear is synonymous with abrasion and can result from metal-to-metal contact or metal-to-nonmetal contact. Such wear is characterized by relatively uniform loss of metal from the surface, as contrasted to localized grooving with consequent metal build-up, as a result of rubbing a much harder metallic surface against a softer metallic surface.
- An article by Harry Tanczyn, entitled “Stainless Steel Galling Characteristics Checked” in STEEL, Apr. 20, 1954 points out that stainless steel sections at a relatively high hardness level or with a substantial difference in hardness, exhibit better resistance to galling than the combination of two soft members. This may be explained by the theory that the hardened sections deform elastically near the contact points under loading, while the softer pieces yield plastically for a significant distance beneath the contact points. During movement, the hardened surfaces apparently recover elastically with decrease in pressure, and this motion tends to sever any metallic welding.
- Among the numerous prior art steels currently available, the austenitic Type 304 is suited to a variety of uses involving welding and fabrication, but the galling and wear resistance of this steel are poor and the metal is likely to fail when subjected to such conditions.
- In view of the perceived problems with galling, the art has recently turned to cobalt bearing and high nickel alloys which are known to fight wear and galling.
- It is therefore a primary object of the present invention to provide nut assemblies which tend to limit, if not eliminate, galling.
- To accomplish this objective, among others, the present invention relates to a nut assembly comprising a nut including a threaded barrel for receiving a threaded fastener and a fastener insert which assists in securing the fastener within the nut. At a minimum, the fastener insert will be formed from a nitrogen strengthened stainless steel alloy and, optionally, both the insert and nut can be formed from the alloy. The stainless steel alloy preferably will include a positive amount up to a total of about 0.8% nitrogen. More particularly, the present invention relates to a nut assembly including a fastener insert or both the fastener insert and nut formed from a nitrogen strengthened stainless steel alloy comprising: a) from about 0.05 to 0.15% carbon; b) from about 5.0 to 12.0% manganese; c) from about 2.0 to 6.0% silicon; d) from about 12.0 to 20.0% chromium; e) from about 6.0 to 12.0% nickel; f) from about 0.02 to 0.8% nitrogen; with the remainder being iron.
- Still more preferably, at least one of the nut or fastener inserts is formed from a nitrogen strengthened stainless steel alloy comprising a) from about 0.07 to 0.12% carbon; b) from about 7.0 to 10.0% manganese; c) from about 3.0 to 5.0% silicon; d) from about 14.0 to 18.0% chromium; e) from about 7.0 to 10.0% nickel; f) from about 0.06 to 0.3% nitrogen; with the remainder being iron.
- According to a highly preferred embodiment, the nut and/or fastener insert will be formed from a nitrogen strengthened austenitic stainless steel alloy comprising: a) from about 0.08 to 0.1% carbon; b) from about 7.0 to 9.0% manganese; c) from about 3.5 to 4.5% silicon; d) from about 16.0 to 18.0% chromium; e) from about 8.0 to 9.0% nickel; f) from about 0.08 to 0.18% nitrogen; with the remainder being iron.
- After forming the alloy into a nut using a conventional nut making machine, the nitrogen strengthened nuts are generally inventoried for later use. Similarly, the fastener inserts are formed from the alloy as a round wire shaped to a diamond cross section which is subsequently coiled to form the insert. The resulting nut assemblies should have excellent anti-galling characteristics at both ambient and elevated temperatures. Further, the nut assemblies should have good corrosion resistance and a room temperature yield strength. The nitrogen strengthened stainless steel nut assemblies of the present invention also provide excellent oxidation resistance and excellent impact strength, particularly at sub-zero temperatures.
- FIG. 1 is a blown apart perspective view of an anti-galling nut assembly in accordance with the teachings of the present invention;
- FIG. 2 is an assembly view in cross-section of the nut assembly of FIG. 1;
- FIG. 3 is an assembly view in cross-section demonstrating the nut assembly and threaded fastener securing an object;
- FIG. 4 is a perspective view of a free running helically wound insert for use in a nut assembly;
- FIG. 5 is a perspective view of a self-locking helically wound insert for use in a nut assembly; and
- FIG. 6 is a cross-sectional view taken along line6-6 of FIG. 5 demonstrating a locking convolution.
- Referring to FIGS.1-2, there is shown an
anti-galling nut assembly 10 including anut 12 and afastener insert 14. According to the present invention, at least one of the components, i.e., thenut 12 or fastener insert 14 formed from a nitrogen strengthened stainless steel alloy as described below. The fastener insert 14, which may be of a variety of shapes and sizes, is shown to be in the form of a helically coiled wire to be used in association with a threadedfastener 16. As shown in FIG. 3, the insert is positioned within a threadedbarrel 20 of the nut to secure anobject 30 in combination with thefastener 16. - Preferably, the
fastener inserts 14 are manufactured such that they are larger in diameter, before installation, than the threadedbarrel 20 of the nut to ensure that they become firmly secured. For helically wound fastener inserts, it is preferable that the coils have about a 60° internal screw thread convolution which can accommodate virtually any standard threaded bolt or screw. Additionally, the fastener inserts may include removable or break awaytangs 32, as shown most clearly in FIGS. 4 and 5, including a detent 28 which is useful for facilitating removal of the tang after insertion. - The alloys employed to form the anti-galling fastener inserts of the present invention have been analyzed using a “button and block” galling test to rank various stainless steel alloys for their galling tendencies. According to the procedure, a dead load weight was applied in a Brinell Hardness Tester on two flat, polished surfaces (10-20 micro-inches). Buttons having a 0.5 inch diameter were slowly rotated by hand 360° under the load and then examined for galling at a 7× magnification. If no galling was apparent, new specimens were tested at higher stresses until galling was observed. The “threshold” galling stress was selected as the stress midway between the highest non-galled stress and the stress where galling was first observed. As illustrated in Table 1 below, the alloys of the present invention had values of greater than 50, thereby significantly outperforming all other stainless steel alloys tested for galling characteristics.
TABLE 1 Alloy of Conditions & Nominal Type Type Type Type Type Type Type Present Hardness (Brinell) 410 416 430 440C 303 304 316 Invention Type 410 3 4 3 3 4 2 2 50+ Type 416 4 13 3 21 9 24 42 50 Type 430 3 3 2 2 2 2 2 36 Type 440C 3 21 2 11 5 3 37 50+ Type 303 4 9 2 5 2 2 3 50+ Type 304 2 24 2 3 2 2 2 50+ Type 316 2 42 2 37 3 2 2 38 Alloy of Present 50+ 50+ 36 50+ 50+ 50+ 38 50+ Invention - Fastener inserts manufactured using the alloys of the present invention as well as inserts formed from Type 304 stainless steels were installed into aluminum blocks provided with #10-32 size bores for analysis.
- To analyze for resistance to friction forces, a comparison was made between “standard tapped hole assemblies” and assemblies incorporating the fastener inserts of the present invention. The so-called standard tapped holes included preparing Type 316 stainless steel test blocks with #10-32 size threaded bores which were electropolished and introducing both plain and chemically polished Type 316 stainless steel screws which were cleaned to electronic industry standards. While Type 304 stainless steel inserts were originally used in the standard tapped hole assemblies, the torque required for rotation of the screws varied so drastically from one sample to the next that no quantitative data could be compiled. As such, the analysis on the standard tapped hole assemblies were carried out without fastener inserts.
- The fastener of the present invention as well as those formed from various other alloys were disposed in identical aluminum test blocks with #10-32 size threaded bores. Both plain and chemically polished Type 316 stainless steel screws were used to measure the friction forces. Torque tests were conducted with test blocks perfectly aligned as well as misaligned by 2 and 4 degrees from perpendicular. The torque was recorded for twenty screws under each assembly with ten insertions for each screw.
- As should be understood by those skilled in the art, friction between a screw and a tapped hole can diminish the pre-load on the screw by absorbing some of the rotational torque during installation. In extreme instances, the friction during rotation can lead to galling and self-welding, thus, resulting in seizure of the fastener.
- The torque required to rotate the stainless steel screws in the standard tapped holes increased from the first to the tenth insertion and increased dramatically with an increase in the angle of misalignment. The calculated installation torque increased by as much as 77%.
- The torque required for rotation of the same stainless steel screws within the fastener insert formed from the nitrogen strengthened stainless steel alloys of the present invention were between 17% to 44% lower than the comparable standard tapped holes. Additionally the friction forces generated with an increase in the misalignment angle were significantly lower than the standard tapped holes. Perhaps most importantly, the required torque values for the fastener assemblies employing the inserts of the present invention were substantially uniform as compared to the standard. As such, the holding power of the screws from one application to the next should be relatively consistent.
- In view of the foregoing analysis, nut assemblies employing fastener inserts formed by the alloys herein described should theoretically demonstrate similar results as compared to those formed from other known stainless steel alloys.
- Referring to FIGS.3-5, two fastener insert embodiments, namely free running inserts and locking inserts are shown. By free running, it is meant that the insert disposed within the nut barrel has a substantially symmetrical helical coil over its entire length, whereas a locking insert includes at least one
unsymmetrical convolution 34, usually includingstraight segments 36 as shown in FIG. 5. - The
nut 12 ofnut assembly 10, which may be made on a conventional nut making machine and generally includes abarrel 20 of generally constant pitch and diameter throughout. Optionally, upon installing theinsert 14 within thenut barrel 20, the internal threads of the nut may be deformed at eachend - As noted above, at least one of the nut assembly components, i.e., the fastener insert and/or the nut are formed from an alloy comprising a) from about 0.05 to 0.15% carbon; b) from about 5.0 to 12.0% manganese; c) from about 2.0 to 6.0% silicon; d) from about 12.0 to 20.0% chromium; e) from about 6.0 to 12.0% nickel; f) from about 0.02 to 0.8% nitrogen; with the remainder being iron.
- While it will be apparent that the preferred embodiments of the invention disclosed are well calculated to fulfill the objects stated, it will be appreciated that the invention is susceptible to modification, variation and change without departing from the spirit thereof.
Claims (18)
1. A nut assembly including a fastener insert and a nut having a barrel for receiving the insert, wherein at least one of the components selected for the fastener insert and nut is formed from a nitrogen strengthened stainless steel alloy comprising:
a) from about 0.05 to 0.15% carbon;
b) from about 5.0 to 12.0% manganese;
c) from about 2.0 to 6.0% silicon;
d) from about 12.0 to 20.0% chromium;
e) from about 6.0 to 12.0% nickel;
f) from about 0.02 to 0.8% nitrogen;
with the remainder being iron.
2. The nut assembly of wherein said fastener insert is in the form of a helically coiled wire.
claim 1
3. The nut assembly of wherein said helically coiled wire has a substantially diamond shaped cross section.
claim 2
4. The nut assembly of wherein said helically coiled wire has about a 60° internal screw thread convolution.
claim 2
5. The nut assembly of wherein said helically coiled wire includes a selectively removable tang.
claim 1
6. The nut assembly of wherein said assembly is resistant to galling.
claim 1
7. The nut assembly of wherein said fastener insert includes at least one geometrically dissimilar convolution.
claim 1
8. The nut assembly of wherein said at least one geometrically dissimilar convolution is substantially hexagonal in shape.
claim 7
9. A nut assembly for use in association with a threaded fastener comprising:
a nut having an internal screw thread barrel; and
a fastener insert disposed within said barrel for receiving said threaded fastener;
wherein at least one of said nut and fastener insert is formed from a nitrogen strengthened stainless steel alloy which is resistant to galling.
10. The nut assembly of wherein the fastener insert is formed from an alloy comprising:
claim 9
a) from about 0.05 to 0.15% carbon;
b) from about 5.0 to 12.0% manganese;
c) from about 2.0 to 6.0% silicon;
d) from about 12.0 to 20.0% chromium;
e) from about 6.0 to 12.0% nickel;
f) from about 0.02 to 0.8% nitrogen;
with the remainder being iron.
11. The nut assembly of wherein said fastener insert is a helically coiled wire.
claim 9
12. The nut assembly of wherein said fastener insert has a substantially diamond shaped cross section.
claim 10
13. The nut assembly of wherein said fastener insert has about a 60° internal screw thread convolution.
claim 10
14. The nut assembly of wherein said fastener insert includes a selectively removable tang.
claim 10
15. The nut assembly of wherein said assembly is resistant to galling.
claim 10
16. The nut assembly of wherein said fastener insert includes at least one geometrically dissimilar convolution.
claim 10
17. The nut assembly of wherein said at least one geometrically dissimilar convolution is substantially hexagonal in shape.
claim 16
18. The nut assembly of wherein said nut is formed from an alloy comprising:
claim 9
a) from about 0.05 to 0.15% carbon;
b) from about 5.0 to 12.0% manganese;
c) from about 2.0 to 6.0% silicon;
d) from about 12.0 to 20.0% chromium;
e) from about 6.0 to 12.0% nickel;
f) from about 0.02 to 0.8% nitrogen;
with the remainder being iron.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/753,989 US20010014263A1 (en) | 2000-02-04 | 2001-01-03 | Anti-galling nut assembly |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/498,821 US6494659B1 (en) | 2000-02-04 | 2000-02-04 | Anti-galling fastener inserts |
US09/753,989 US20010014263A1 (en) | 2000-02-04 | 2001-01-03 | Anti-galling nut assembly |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/498,821 Continuation-In-Part US6494659B1 (en) | 2000-02-04 | 2000-02-04 | Anti-galling fastener inserts |
Publications (1)
Publication Number | Publication Date |
---|---|
US20010014263A1 true US20010014263A1 (en) | 2001-08-16 |
Family
ID=23982639
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/498,821 Expired - Lifetime US6494659B1 (en) | 2000-02-04 | 2000-02-04 | Anti-galling fastener inserts |
US09/753,989 Abandoned US20010014263A1 (en) | 2000-02-04 | 2001-01-03 | Anti-galling nut assembly |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/498,821 Expired - Lifetime US6494659B1 (en) | 2000-02-04 | 2000-02-04 | Anti-galling fastener inserts |
Country Status (3)
Country | Link |
---|---|
US (2) | US6494659B1 (en) |
EP (1) | EP1122449A3 (en) |
JP (1) | JP4848093B2 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003040576A1 (en) * | 2001-11-02 | 2003-05-15 | Newfrey Llc | Helically coiled titanium wire fastener inserts |
GB2408301A (en) * | 2003-11-18 | 2005-05-25 | Fort Vale Eng Ltd | Securing nut |
WO2005124165A1 (en) * | 2004-06-15 | 2005-12-29 | Böllhoff Verbindungstechnik GmbH | Wire threaded insert made of magnesium or aluminium alloy |
US20150014466A1 (en) * | 2009-10-02 | 2015-01-15 | Böllhoff Verbindungstechnik GmbH | Moldable wire thread insert, method for its production, component with a moldable wire thread insert as well as a method for its production |
US20170205315A1 (en) * | 2016-01-19 | 2017-07-20 | Philip E. Preston | Helical insert inspection device |
CN106975672A (en) * | 2017-04-10 | 2017-07-25 | 全永斌 | One seed nucleus level screw-thread bush finished product hardness integrates the technical method to be formed |
CN110513378A (en) * | 2019-09-17 | 2019-11-29 | 湖南科技大学 | A kind of helical coil and preparation method thereof |
CN112458371A (en) * | 2020-12-07 | 2021-03-09 | 邯郸市倚道金属制品有限公司 | Fine-rolled deformed steel bar formula with good performance and heat treatment method of fine-rolled deformed steel bar |
US11209041B2 (en) * | 2017-05-15 | 2021-12-28 | Sky Climber Fasteners LLC | Composite fastener with locking cap feature |
US20220389950A1 (en) * | 2019-10-31 | 2022-12-08 | Hilti Aktiengesellschaft | Screw with axially compressible thread |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040181227A1 (en) * | 2003-03-11 | 2004-09-16 | Farid Khalili | System and method for attaching a bone plate to bone |
US20050013681A1 (en) * | 2003-06-20 | 2005-01-20 | Carvalho John F. | Non-current conducting nut |
DE202005015860U1 (en) * | 2005-10-10 | 2005-12-08 | Böllhoff Verbindungstechnik GmbH | System for bolting two components together while leaving gap between them comprises compensating coil fitted over bolt which is forced into gap as screw is driven, bolt then passing through second component |
US7299725B2 (en) * | 2006-03-07 | 2007-11-27 | Diba Industries, Inc. | Torque fastening devices and apparatuses |
US20070292238A1 (en) * | 2006-06-19 | 2007-12-20 | Simon James Bowen | Thread forming wire thread insert |
DE102008040694A1 (en) * | 2008-07-24 | 2010-01-28 | Hilti Aktiengesellschaft | anchoring element |
DE202011052036U1 (en) | 2011-11-18 | 2013-02-20 | Jörg Schwarzbich | Tolerance compensation element |
FR2989144B1 (en) * | 2012-04-04 | 2014-05-09 | Technip France | ASSEMBLY OF A FLEXIBLE TUBULAR CONDUIT FOR TRANSPORTING HYDROCARBON FLUIDS WITH A SECONDARY METAL TUBE |
US10280964B2 (en) | 2016-02-15 | 2019-05-07 | Hamilton Sundstrand Corporation | Nut insert with reduced stress |
US11333190B1 (en) | 2017-09-27 | 2022-05-17 | Sky Climber Fasteners LLC | Ballistic resistant panel insert assembly |
CN105927652A (en) * | 2016-06-12 | 2016-09-07 | 辽宁四方核电装备股份有限公司 | Threaded body in which steel wire threaded sleeve is embedded |
KR101800838B1 (en) * | 2016-07-06 | 2017-11-29 | (주)해피엘 | Dental implant having a fixture made of ceramic |
US11261903B2 (en) | 2016-07-28 | 2022-03-01 | Sky Climber Fasteners LLC | Expandable diameter fastener with cam-lock feature |
US11873856B2 (en) | 2018-02-27 | 2024-01-16 | Bpc Lg 2, Llc | Precision torque control positive lock nut |
US11137015B2 (en) * | 2018-02-27 | 2021-10-05 | Donald Wayne Rice | Precision torque control positive lock nut |
CN110184516A (en) * | 2019-06-10 | 2019-08-30 | 成渝钒钛科技有限公司 | A kind of high line φ 6mm-HRB400E spiral shell disk and its production method |
EP3816460A1 (en) * | 2019-10-31 | 2021-05-05 | Hilti Aktiengesellschaft | Screw with axial thread play |
CN114015952A (en) * | 2021-11-05 | 2022-02-08 | 连云港力升金属科技有限公司 | High-toughness corrosion-resistant stainless steel wire and preparation method thereof |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2363789A (en) * | 1943-12-16 | 1944-11-28 | Aircraft Screw Prod Co | Wire coil insert |
US2607259A (en) * | 1950-04-29 | 1952-08-19 | Heli Coil Corp | Wire coil screw thread insert |
US2672070A (en) | 1953-06-10 | 1954-03-16 | Heli Coil Corp | Wire coil screw thread insert for molded material |
US3912503A (en) | 1973-05-14 | 1975-10-14 | Armco Steel Corp | Galling resistant austenitic stainless steel |
US4039356A (en) * | 1973-05-14 | 1977-08-02 | Schumacher William J | Galling resistant austenitic stainless steel |
JPS5952228B2 (en) * | 1980-07-09 | 1984-12-18 | 株式会社日立製作所 | Sliding structure for nuclear reactor |
JPS5848654A (en) * | 1981-09-18 | 1983-03-22 | Hitachi Ltd | Sliding mechanism |
US4645398A (en) * | 1983-09-16 | 1987-02-24 | Rexnord Inc. | Tangless helically coiled insert |
US4563119A (en) * | 1984-02-21 | 1986-01-07 | Rexnord Inc. | Hook cutout for tangless helically coiled insert |
JPS61127982A (en) * | 1984-11-26 | 1986-06-16 | Rion Co Ltd | Piezoelectric valve and driving method thereof |
JPS61127982U (en) * | 1985-01-28 | 1986-08-11 | ||
US4814140A (en) | 1987-06-16 | 1989-03-21 | Carpenter Technology Corporation | Galling resistant austenitic stainless steel alloy |
SE464873B (en) * | 1990-02-26 | 1991-06-24 | Sandvik Ab | OMAGNETIC, EXCELLENT STAINABLE STAINLESS STEEL |
JPH0674226A (en) * | 1991-12-04 | 1994-03-15 | Katsumi Ikeda | Mechanical element for fastening and joining thereof |
US5254184A (en) | 1992-06-05 | 1993-10-19 | Carpenter Technology Corporation | Corrosion resistant duplex stainless steel with improved galling resistance |
US5340534A (en) * | 1992-08-24 | 1994-08-23 | Crs Holdings, Inc. | Corrosion resistant austenitic stainless steel with improved galling resistance |
US5860779A (en) * | 1997-11-26 | 1999-01-19 | Mcdonnell Douglas Corporation | Locking nut |
-
2000
- 2000-02-04 US US09/498,821 patent/US6494659B1/en not_active Expired - Lifetime
-
2001
- 2001-01-03 US US09/753,989 patent/US20010014263A1/en not_active Abandoned
- 2001-02-01 EP EP01300898A patent/EP1122449A3/en not_active Ceased
- 2001-02-02 JP JP2001026395A patent/JP4848093B2/en not_active Expired - Fee Related
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003040576A1 (en) * | 2001-11-02 | 2003-05-15 | Newfrey Llc | Helically coiled titanium wire fastener inserts |
GB2408301A (en) * | 2003-11-18 | 2005-05-25 | Fort Vale Eng Ltd | Securing nut |
GB2408301B (en) * | 2003-11-18 | 2007-05-23 | Fort Vale Eng Ltd | Securing nut |
WO2005124165A1 (en) * | 2004-06-15 | 2005-12-29 | Böllhoff Verbindungstechnik GmbH | Wire threaded insert made of magnesium or aluminium alloy |
US10005211B2 (en) * | 2009-10-02 | 2018-06-26 | Böllhoff Verbindungstechnik GmbH | Moldable wire thread insert, method for its production, component with a moldable wire thread insert as well as a method for its production |
US20150014466A1 (en) * | 2009-10-02 | 2015-01-15 | Böllhoff Verbindungstechnik GmbH | Moldable wire thread insert, method for its production, component with a moldable wire thread insert as well as a method for its production |
US10317317B2 (en) * | 2016-01-19 | 2019-06-11 | Littlestar Plastics, Llc | Helical insert inspection device including thread-forming member |
WO2017127358A1 (en) * | 2016-01-19 | 2017-07-27 | Preston Philip E | Helical insert inspection device |
US20170205315A1 (en) * | 2016-01-19 | 2017-07-20 | Philip E. Preston | Helical insert inspection device |
CN106975672A (en) * | 2017-04-10 | 2017-07-25 | 全永斌 | One seed nucleus level screw-thread bush finished product hardness integrates the technical method to be formed |
US11209041B2 (en) * | 2017-05-15 | 2021-12-28 | Sky Climber Fasteners LLC | Composite fastener with locking cap feature |
US11732745B2 (en) | 2017-05-15 | 2023-08-22 | Sky Climber Fasteners LLC | Fastener system |
CN110513378A (en) * | 2019-09-17 | 2019-11-29 | 湖南科技大学 | A kind of helical coil and preparation method thereof |
US20220389950A1 (en) * | 2019-10-31 | 2022-12-08 | Hilti Aktiengesellschaft | Screw with axially compressible thread |
CN112458371A (en) * | 2020-12-07 | 2021-03-09 | 邯郸市倚道金属制品有限公司 | Fine-rolled deformed steel bar formula with good performance and heat treatment method of fine-rolled deformed steel bar |
Also Published As
Publication number | Publication date |
---|---|
JP2001220655A (en) | 2001-08-14 |
US6494659B1 (en) | 2002-12-17 |
JP4848093B2 (en) | 2011-12-28 |
EP1122449A3 (en) | 2003-12-10 |
EP1122449A2 (en) | 2001-08-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20010014263A1 (en) | Anti-galling nut assembly | |
EP1440245B1 (en) | Helically coiled titanium wire fastener inserts | |
US3912503A (en) | Galling resistant austenitic stainless steel | |
US2152681A (en) | Screw connection | |
EP1589237B1 (en) | Chromate free fluoropolymer coated fastener inserts | |
US4039356A (en) | Galling resistant austenitic stainless steel | |
US6224311B1 (en) | Coated fastener inserts and method of producing the same | |
US2150876A (en) | Screw fastening for high strength connections | |
EP3919640A1 (en) | Cu-al-mn-based shape-memory alloy molded article and method for producing same | |
US20030190213A1 (en) | Plated fastener inserts and method of producing the same | |
JP4455424B2 (en) | Connecting structure using self-tapping screws | |
DE1900049C3 (en) | Self-lubricating bearing | |
US11920624B2 (en) | Zn-Ni as a coating layer on self-drilling screws of austenitic stainless steel | |
EP3532739B1 (en) | Improvements in or relating to screwbolts | |
WO2018088913A1 (en) | Lock washer | |
Jackson | Significance of surface preparation for bolted aluminium joints | |
US6811623B2 (en) | Copper-nickel-manganese alloy, products made therefrom and method of manufacture of products therefrom | |
Baggerly | Hydrogen-assisted stress cracking of high-strength wheel bolts | |
JP2006265718A (en) | Central contact, anchor connector, and their production method, and their connector structure | |
Hayes | Fatigue of Springs | |
Murphy et al. | Preload Relaxation of Steel Fasteners in Zinc Alloy Pressure Die Castings-Some Engineering Solutions | |
Stephens et al. | Fatigue of high strength bolts rolled before or after heat treatment with five different preload levels | |
Bradley et al. | Influence of cold rolling threads before or after heat treatment on the fatigue resistance of high strength fine thread bolts for multiple preload conditions | |
US20020182030A1 (en) | Threaded fastener and method of clamping using the same | |
Layton et al. | Corrosion-resistant fasteners: A review |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: EMHART, INC., DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GIANNAKAKOS, WILLIAM;BOTELLE, JOHN D.;REEL/FRAME:011423/0974 Effective date: 20001219 |
|
AS | Assignment |
Owner name: EMHART LLC, DELAWARE Free format text: CHANGE OF NAME;ASSIGNOR:EMHART INC.;REEL/FRAME:013036/0919 Effective date: 20011029 |
|
STCB | Information on status: application discontinuation |
Free format text: EXPRESSLY ABANDONED -- DURING EXAMINATION |