DIN 912 M8 × 16 Socket head (cylindrical)
DIN 912 M8 × 16 is a socket head cap screw with a 16 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.
Dimensions
- Standard
- DIN 912
- Type
- Socket head cap screw
- Size
- M8 × 16
- Thread
- M8 × 1
- Length L
- 16 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 14.649 g per piece in steel (14.742 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M8 thread pageOther 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.
Choosing and fitting this size
DIN 912 M8 × 16 is a socket head (cylindrical) in M8, 16 mm long under the head, on a 1 mm coarse pitch. Mating threads should be a matching class nut or a tapped hole of the same nominal size.
Common stock grades are 8.8, 10.9 and 12.9 in steel, plus A2-70 and A4-80 in stainless. Class 10.9 and 12.9 carry roughly 1.25 and 1.5 times the proof load of 8.8, but they also need a properly rated mating nut — a class 8 nut under a 12.9 bolt simply moves the failure into the thread. Zinc-plated 10.9 and above should be baked to avoid hydrogen embrittlement.
For a tapped hole, M8 × 1 mm takes a 7 mm tap drill, and the external thread's minor diameter is 6.77 mm — that is the section carrying the load, not the nominal M8 figure. Thread engagement of at least one times the nominal diameter is what lets the bolt fail before the thread strips.