DE20305949U1 - Self-tapping screw has two threaded sections on shank with opposite leads, and pitch angle may the same or different - Google Patents

Self-tapping screw has two threaded sections on shank with opposite leads, and pitch angle may the same or different

Info

Publication number
DE20305949U1
DE20305949U1 DE20305949U DE20305949U DE20305949U1 DE 20305949 U1 DE20305949 U1 DE 20305949U1 DE 20305949 U DE20305949 U DE 20305949U DE 20305949 U DE20305949 U DE 20305949U DE 20305949 U1 DE20305949 U1 DE 20305949U1
Authority
DE
Germany
Prior art keywords
screw
thread
self
tapping screw
section
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.)
Expired - Lifetime
Application number
DE20305949U
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Altenloh Brinck and Co GmbH and Co KG
Original Assignee
Altenloh Brinck and Co GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Altenloh Brinck and Co GmbH and Co KG filed Critical Altenloh Brinck and Co GmbH and Co KG
Publication of DE20305949U1 publication Critical patent/DE20305949U1/en
Priority to CA 2452521 priority Critical patent/CA2452521C/en
Priority to DE10357550A priority patent/DE10357550A1/en
Priority to GB0329242A priority patent/GB2397105B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0052—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge having indentations, notches or the like in order to improve the cutting behaviour
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0015—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a soft organic material, e.g. wood or plastic
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0057—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0057—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
    • F16B25/0063—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections with a non-threaded portion on the shaft of the screw
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0073—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw characterised by its pitch, e.g. a varying pitch
    • 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
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • 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
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
    • 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
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • F16B5/0275—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread the screw-threaded element having at least two axially separated threaded portions
    • 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
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms
    • F16B2033/025—Shape of thread; Special thread-forms with left-hand thread

Abstract

The self-tapping screw comprises a screw head (101) to which is joined a screw shank (102) and screw point (103). The screw shank has two threaded sections (105,107 which have opposite leads. The pitch angle may be the same or different. The thread height between the turns of the screw head nearer to the head is smaller, and in particular 2.5mm, than the thread height between two turns of the thread nearer the point, which in particular is 2.8mm.

Description

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßtThe description text was not recorded electronically

Claims (18)

1. Selbstschneidende Schraube, bestehend aus einem Schraubenkopf (1; 101) und einem sich daran anschließenden Schraubenschaft (2; 102) und einer Schraubenspitze (3; 103), wobei auf dem Schraubenschaft (2; 102) zwei Gewindeabschnitte (5, 7; 105, 107) ausgebildet sind, die durch einen gewindefreien Abschnitt (6; 106) getrennt sind, und die Gewinde der beiden Gewindeabschnitte (5, 7; 105, 107) unterschiedliche Steigungen besitzen, dadurch gekennzeichnet, dass die Gewinde der beiden Gewindeabschnitte (105, 107) eine entgegengesetzte Steigung aufweisen.1. Self-tapping screw, comprising a screw head (1; 101) and an adjoining screw shank (2; 102) and a screw tip (3; 103), wherein on the screw shank (2; 102) has two threaded sections (5, 7; 105 , 107 ) are formed, which are separated by a thread-free section ( 6 ; 106 ), and the threads of the two thread sections ( 5 , 7 ; 105 , 107 ) have different pitches, characterized in that the threads of the two thread sections ( 105 , 107 ) have an opposite slope. 2. Selbstschneidende Schraube nach Anspruch 1, dadurch gekennzeichnet, dass der Steigungswinkel der beiden Gewindeabschnitte (105, 107) gleich groß ist.2. Self-tapping screw according to claim 1, characterized in that the pitch angle of the two threaded sections ( 105 , 107 ) is the same size. 3. Selbstschneidende Schraube nach Anspruch 1, dadurch gekennzeichnet, dass der Steigungswinkel der beiden Gewindeabschnitte (105, 107) unterschiedlich groß ist.3. Self-tapping screw according to claim 1, characterized in that the pitch angle of the two threaded sections ( 105 , 107 ) is of different sizes. 4. Selbstschneidende Schraube nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Gewindehöhe zwischen zwei Gewindegängen des Schraubenkopf nahen Gewindeabschnittes (105) kleiner ist, insbesondere 2,5 mm beträgt, als die Gewindehöhe zwischen zwei Gewindegängen des Schraubenspitzen nahen Gewindeabschnittes (107), die insbesondere 2,8 mm beträgt.4. Self-tapping screw according to one of claims 1 to 3, characterized in that the thread height between two threads of the screw portion near the screw portion ( 105 ) is smaller, in particular 2.5 mm, than the thread height between two threads of the screw tip near thread portion ( 107 ), which is in particular 2.8 mm. 5. Selbstschneidende Schraube nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Gewindeaußendurchmesser (D2) des Schraubenkopf nahen Gewindeab­ schnittes (105) kleiner ist, insbesondere 5,3 mm beträgt, als der Gewinde­ außendurchmesser (D3) des Schraubenspitzen nahen Gewindeabschnittes (107), der insbesondere 5,5 mm beträgt, und die Gewindeabschnitte (105, 107) den gleichen Kerndurchmesser (d) aufweisen. 5. Self-tapping screw according to one of claims 1 to 4, characterized in that the outer thread diameter (D2) of the screw head near thread section ( 105 ) is smaller, in particular 5.3 mm, than the outer thread diameter (D3) of the screw tip near thread section ( 107 ), which is 5.5 mm in particular, and the threaded sections ( 105 , 107 ) have the same core diameter (d). 6. Selbstschneidende Schraube nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Länge der Schraubenspitze nahen Gewindeabschnittes (107) etwa 2,0 bis 3,0, insbesondere 2,6 bis 2,7 mal größer ist, als die des Schraubenkopf nahen Gewindeabschnittes (105).6. Self-tapping screw according to one of claims 1 to 5, characterized in that the length of the screw portion near the screw portion ( 107 ) is about 2.0 to 3.0, in particular 2.6 to 2.7 times larger than that of the screw head near thread section ( 105 ). 7. Selbstschneidende Schraube nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Schraubenkopf (101)2 bis 3 mm, insbesondere 2,6 mm, hoch ist.7. Self-tapping screw according to one of claims 1 to 6, characterized in that the screw head ( 101 ) is 2 to 3 mm, in particular 2.6 mm, high. 8. Selbstschneidende Schraube nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der gewindefreie Abschnitt (106) einen größeren Durchmesser (D4) aufweist, als der Kerndurchmesser (d) der beiden Gewindeabschnitte (105, 107).8. Self-tapping screw according to one of claims 1 to 7, characterized in that the unthreaded section ( 106 ) has a larger diameter (D4) than the core diameter (d) of the two threaded sections ( 105 , 107 ). 9. Selbstschneidende Schraube bestehend aus einem Schraubenkopf (1; 101) und einen sich daran anschließenden Schraubenschaft (2; 102) und einer Schraubenspitze (3; 103), wobei auf dem Schraubenschaft (2; 102) zwei Gewindeabschnitte (5, 7; 105, 107) ausgebildet sind, die durch einen gewindefreien Abschnitt (6; 106) getrennt sind, und die Gewinde der beiden Gewindeabschnitte (5, 7; 105, 107) unterschiedliche Steigungen besitzen, dadurch gekennzeichnet, dass der schraubenspitzenahe Gewindeabschnitt (7) aus einem mehrgängigen Gewinde gebildet ist, wobei die Gewindegänge des mehrgängigen Gewindeabschnittes (7) eine größere Gewindesteigung besitzen als die Gewindegänge des dem Schraubenkopf nahen Gewindeabschnittes (5).9. Self-tapping screw consisting of a screw head ( 1 ; 101 ) and an adjoining screw shaft ( 2 ; 102 ) and a screw tip ( 3 ; 103 ), with two threaded sections ( 5 , 7 ; 105 ) on the screw shaft ( 2 ; 102 ) , 107 ) are formed, which are separated by a thread-free section ( 6 ; 106 ), and the threads of the two threaded sections ( 5 , 7 ; 105 , 107 ) have different pitches, characterized in that the threaded section ( 7 ) close to the screw tip is made of one multi-start thread is formed, the threads of the multi-start thread section ( 7 ) having a greater thread pitch than the thread turns of the screw section ( 5 ) near the screw head. 10. Selbstschneidende Schraube nach Anspruch 9, dadurch gekennzeichnet, dass der mehrgängige Gewindeabschnitt (7) als zweigängiger Gewindeabschnitt ausgebildet ist. 10. Self-tapping screw according to claim 9, characterized in that the multi-start thread section ( 7 ) is designed as a two-start thread section. 11. Selbstschneidende Schraube nach einem der Ansprüche 9 oder 10, dadurch gekennzeichnet, dass die Gewinde(9, 10)beider Gewindeabschnitte (5, 7) den gleichen Gewindeaußendurchmesser (D1) besitzen, und die Gewindeabschnitte (5, 7) den gleichen Kerndurchmesser (d) aufweisen.11. Self-tapping screw according to one of claims 9 or 10, characterized in that the threads ( 9 , 10 ) of both threaded sections ( 5 , 7 ) have the same outer thread diameter (D1), and the threaded sections ( 5 , 7 ) have the same core diameter ( d) have. 12. Selbstschneidende Schraube nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass das Gewinde (10; 110)des zweiten Gewindeabschnittes (7; 107) auf der Schraubenspitze (3; 103) bis zu deren Ende verläuft.12. Self-tapping screw according to one of claims 1 to 11, characterized in that the thread ( 10 ; 110 ) of the second threaded section ( 7 ; 107 ) on the screw tip ( 3 ; 103 ) extends to the end thereof. 13. Selbstschneidende Schraube nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, dass das Steigungsverhältnis der Gewindesteigung der Gewindegänge des zweigängigen Gewindes zu der Gewindesteigung des eingängigen Gewindes wie 2 : 1 ist.13. Self-tapping screw according to one of claims 9 to 12, characterized in that the slope ratio of the Thread pitch of the threads of the two-start thread to the Thread pitch of the single-start thread is like 2: 1. 14. Selbstschneidende Schraube nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass der Schraubenkopf (1; 101) an seiner Unterseite eine umlaufende, gegenüber seiner unterseitigen Kopffläche (15; 115) vorstehende Kante (14; 114) aufweist.14. Self-tapping screw according to one of claims 1 to 13, characterized in that the screw head ( 1 ; 101 ) has on its underside a circumferential edge ( 14 ; 114 ) projecting from its underside head surface ( 15 ; 115 ). 15. Selbstschneidende Schraube nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass der Schraubenkopfdurch­ messer am Gewindeschaft nahen Ende größer ist, insbesondere ca. 8,1 mm, beträgt, als der Durchmesser am gegenüberliegenden Ende, der ca. 7,7 mm groß ist.15. Self-tapping screw according to one of claims 1 to 14, characterized in that the screw head knife at the end near the threaded shaft is larger, in particular approximately 8.1 mm, than the diameter at the opposite end is approximately 7.7 mm is great. 16. Selbstschneidende Schraube nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass der Schraubenkopf (1, 101) eine Aufnahme (116) für ein Drehwerkzeug aufweist.16. Self-tapping screw according to one of claims 1 to 15, characterized in that the screw head ( 1 , 101 ) has a receptacle ( 116 ) for a turning tool. 17. Selbstschneidende Schraube nach Anspruch 16, dadurch gekennzeichnet, dass die Aufnahme(116)als Innenvierkant ausgebildet ist. 17. Self-tapping screw according to claim 16, characterized in that the receptacle ( 116 ) is designed as an inner square. 18. Schraubverbindung, bestehend aus zwei aneinanderliegenden Verbindungsteilen (12, 13), insbesondere aus einem Holz-Kunststoff-Composit- Material oder dergleichen, die durch eine in beide Teile eingeschraubte selbstschneidende Schraube miteinander verbunden sind, dadurch gekennzeichnet, dass die selbstschneidende Schraube nach einem oder mehreren der Ansprüche 1 bis 17 ausgebildet ist und der gewindefreie Abschnitt (6; 106) den Anlagebereich der Verbindungsteile (12, 13) überbrückt.18. Screw connection consisting of two adjoining connecting parts ( 12 , 13 ), in particular made of a wood-plastic composite material or the like, which are connected to one another by a self-tapping screw screwed into both parts, characterized in that the self-tapping screw according to one or more of claims 1 to 17 and the thread-free section ( 6 ; 106 ) bridges the contact area of the connecting parts ( 12 , 13 ).
DE20305949U 2003-01-07 2003-04-11 Self-tapping screw has two threaded sections on shank with opposite leads, and pitch angle may the same or different Expired - Lifetime DE20305949U1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA 2452521 CA2452521C (en) 2003-01-07 2003-12-09 Self-tapping screw for composite materials
DE10357550A DE10357550A1 (en) 2003-01-07 2003-12-10 Self-tapping screw has two threaded sections on shank with opposite leads, and pitch angle may the same or different
GB0329242A GB2397105B (en) 2003-01-07 2003-12-17 Self-tapping screw for composite materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43840903P 2003-01-07 2003-01-07

Publications (1)

Publication Number Publication Date
DE20305949U1 true DE20305949U1 (en) 2003-06-18

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Family Applications (1)

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DE20305949U Expired - Lifetime DE20305949U1 (en) 2003-01-07 2003-04-11 Self-tapping screw has two threaded sections on shank with opposite leads, and pitch angle may the same or different

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Country Link
DE (1) DE20305949U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10351884A1 (en) * 2003-10-30 2005-06-02 Adolf Würth GmbH & Co. KG fastener

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10351884A1 (en) * 2003-10-30 2005-06-02 Adolf Würth GmbH & Co. KG fastener

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