DIN 912Socket head (cylindrical)Hexagon socket
DIN 912 M8 × 40 Socket head (cylindrical)
DIN 912 M8 × 40 is a socket head cap screw with a 40 mm nominal length, on a M8 × 1 mm metric thread. A cap screw with a cylindrical head and internal hex drive. Because the head sits above the surface and the drive is recessed, it can be tightened hard and used in counterbores for a flush finish.
Diameter8 mm
Length40 mm
Pitch1 mm
Socket size s6 mm
Head Ø dk13 mm
HeadSocket head (cylindrical)
DriveHexagon socket
Dimensions
- Standard
- DIN 912
- Type
- Socket head cap screw
- Size
- M8 × 40
- Thread
- M8 × 1
- Length L
- 40 mm
- Socket size s
- 6 mm
- Head diameter dk
- 13 mm
- Head height k
- 8 mm
- Thread length b
- 28 mm
- Drive
- Hexagon socket
- Head
- Socket head (cylindrical)
Nominal values in millimetres as published in DIN 912. Estimated weight 24.119 g per piece in steel (24.273 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M8 thread pageDesignationM8 × 1 fine
Pitch1 mm
Major Ø8 mm
Pitch Ø7.35 mm
Minor Ø ext6.77 mm
Tap drillØ 7 mm
Other lengthsDIN 912 M8
All M8 specificationsInterchangeability
DIN 912 is catalogued with ISO 4762 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.