DIN 912Socket head (cylindrical)Hexagon socket
DIN 912 M4 × 20 Socket head (cylindrical)
DIN 912 M4 × 20 is a socket head cap screw with a 20 mm nominal length, on a M4 × 0.7 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.
Diameter4 mm
Length20 mm
Pitch0.7 mm
Socket size s3 mm
Head Ø dk7 mm
HeadSocket head (cylindrical)
DriveHexagon socket
Dimensions
- Standard
- DIN 912
- Type
- Socket head cap screw
- Size
- M4 × 20
- Thread
- M4 × 0.7
- Length L
- 20 mm
- Socket size s
- 3 mm
- Head diameter dk
- 7 mm
- Head height k
- 4 mm
- Thread length b
- 20 mm
- Drive
- Hexagon socket
- Head
- Socket head (cylindrical)
Nominal values in millimetres as published in DIN 912. Estimated weight 3.181 g per piece in steel (3.202 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M4 thread pageDesignationM4 × 0.7
Pitch0.7 mm
Major Ø4 mm
Pitch Ø3.55 mm
Minor Ø ext3.14 mm
Tap drillØ 3.3 mm
Other lengthsDIN 912 M4
All M4 specificationsInterchangeability
DIN 912 is catalogued with ISO 4762 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.