KR900018923U - 두부에 특수요홈이 형성된 나사 - Google Patents
두부에 특수요홈이 형성된 나사Info
- Publication number
- KR900018923U KR900018923U KR2019890005203U KR890005203U KR900018923U KR 900018923 U KR900018923 U KR 900018923U KR 2019890005203 U KR2019890005203 U KR 2019890005203U KR 890005203 U KR890005203 U KR 890005203U KR 900018923 U KR900018923 U KR 900018923U
- Authority
- KR
- South Korea
- Prior art keywords
- screw
- head
- special groove
- special
- groove
- Prior art date
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
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/0023—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially cross-shaped
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019890005203U KR910009294Y1 (ko) | 1989-04-27 | 1989-04-27 | 두부에 특수요홈이 형성된 나사 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2019890005203U KR910009294Y1 (ko) | 1989-04-27 | 1989-04-27 | 두부에 특수요홈이 형성된 나사 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR900018923U true KR900018923U (ko) | 1990-11-08 |
KR910009294Y1 KR910009294Y1 (ko) | 1991-12-05 |
Family
ID=19285496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR2019890005203U KR910009294Y1 (ko) | 1989-04-27 | 1989-04-27 | 두부에 특수요홈이 형성된 나사 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR910009294Y1 (ko) |
-
1989
- 1989-04-27 KR KR2019890005203U patent/KR910009294Y1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR910009294Y1 (ko) | 1991-12-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
REGI | Registration of establishment | ||
LAPS | Lapse due to unpaid annual fee |