DIN 7991
Drawings
| Parameter Name | Description |
|---|
| d1 | shaft diameter |
| d2 | head diameter |
| k_max | head length |
| b2 | threaded length of shaft for 125 mm < l < 200 mm |
| L | threshold threading length, shaft is completely threaded for screws shorter than L |
| b3 | threaded length of shaft for l > 200 mm |
| h_max | maximum unthreaded length of shaft |
| s | width across flats |
| alpha | head angle |
| l | shaft length |
| t | socket depth |
| key | Thread designation |
| b1 | threaded length of shaft for l < 125 mm |
Description
Hexagon socket countersunk head screw, metric sizes
FreeCAD
OpenSCAD
Incantations
module DIN7991(key="M3", l=20, part_mode="default")
function DIN7991_dims(key="M3", l=20, part_mode="default")
function DIN7991_conn(location,key="M3", l=20, part_mode="default")
Connectors
None
Tables
| key | d1 (mm) | d2 (mm) | b1 (mm) | b2 (mm) | b3 (mm) | k_max (mm) | s (mm) | t (mm) | alpha (deg) | L (mm) | h_max (mm) |
|---|
| M2 | 2.0 | 4.0 | None | None | None | 1.2 | 1.25 | None | 90.0 | 12.0 | None |
| M2.5 | 2.5 | 5.0 | None | None | None | 1.5 | 1.5 | None | 90.0 | 16.0 | None |
| M3 | 3.0 | 6.0 | 12.0 | None | None | 1.7 | 2.0 | 1.2 | 90.0 | 30.0 | 3.2 |
| M4 | 4.0 | 8.0 | 14.0 | None | None | 2.3 | 2.5 | 1.8 | 90.0 | 30.0 | 4.4 |
| M5 | 5.0 | 10.0 | 16.0 | None | None | 2.8 | 3.0 | 2.3 | 90.0 | 35.0 | 5.2 |
| M6 | 6.0 | 12.0 | 18.0 | 24.0 | None | 3.3 | 4.0 | 2.5 | 90.0 | 40.0 | 6.3 |
| M8 | 8.0 | 16.0 | 22.0 | 28.0 | None | 4.4 | 5.0 | 3.5 | 90.0 | 45.0 | 8.2 |
| M10 | 10.0 | 20.0 | 26.0 | 32.0 | 45.0 | 5.5 | 6.0 | 4.4 | 90.0 | 55.0 | 10.0 |
| M12 | 12.0 | 24.0 | 30.0 | 36.0 | 49.0 | 6.5 | 8.0 | 4.6 | 90.0 | 60.0 | 11.8 |
| M14 | 14.0 | 27.0 | 34.0 | 40.0 | None | 7.0 | 10.0 | 4.8 | 90.0 | 65.0 | 13.0 |
| M16 | 16.0 | 30.0 | 38.0 | 44.0 | 57.0 | 7.5 | 10.0 | 5.3 | 90.0 | 70.0 | 13.5 |
| M18 | 18.0 | 33.0 | 43.0 | None | None | 8.0 | 12.0 | None | 90.0 | 60.0 | None |
| M20 | 20.0 | 36.0 | 46.0 | 52.0 | 65.0 | 8.5 | 12.0 | 5.9 | 90.0 | 90.0 | 16.0 |
| M22 | 22.0 | 36.0 | None | None | None | 13.1 | 14.0 | None | None | None | None |
| M24 | 24.0 | 39.0 | 54.0 | 60.0 | None | 14.0 | 14.0 | 10.3 | 60.0 | 90.0 | 23.0 |
Comments