DIN 7991 Flat Socket Cap Screws are a headed and externally threaded part designed for insertion through a close tolerance, internally tapped hole and mated with a nut. Tension on the socket cap screw is induced by rotation of the screw head. There is a hex socket in the head that accepts a hex wrench to tighten the socket cap screw. The point at the threaded end of the socket cap screw is machined flat so it will fit into a drilled hole.
Following are the specification for DIN 7991 Flat Socket Head Cap Screws.
d1 | b | t | s | k max | d2 |
---|---|---|---|---|---|
M3 | 12 | 1.2 | 2 | 1.7 | 6 |
M4 | 14 | 1.8 | 2.5 | 2.3 | 8 |
M5 | 16 | 2.3 | 3 | 2.8 | 10 |
M6 | 18 | 2.5 | 4 | 3.3 | 12 |
M8 | 22 | 3.5 | 5 | 4.4 | 16 |
M10 | 26 | 4.4 | 6 | 5.5 | 20 |
M12 | 30 | 4.6 | 8 | 6.5 | 24 |
M16 | 38 | 5.3 | 10 | 7.5 | 30 |
M20 | 46 | 5.9 | 12 | 8.5 | 36 |
M24 | 54 | 10.3 | 14 | 14 | 39 |
All measurements are in millimetres(mm).