ISO 7380 M16 × 100 Button head (low dome)
ISO 7380 M16 × 100 is a button head socket screw with a 100 mm nominal length, on a M16 × 1.5 mm metric thread. A low dome head with internal hex drive. Chosen when you want a finished look without machining a countersink.
Dimensions
- Standard
- ISO 7380
- Type
- Button head socket screw
- Size
- M16 × 100
- Thread
- M16 × 1.5
- Length L
- 100 mm
- Socket size s
- 10 mm
- Head diameter dk
- 28 mm
- Head height k
- 8.8 mm
- Drive
- Hexagon socket
- Head
- Button head (low dome)
Nominal values in millimetres as published in ISO 7380. Estimated weight 200.37 g per piece in steel (201.646 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M16 thread pageOther lengthsISO 7380 M16
All M16 specificationsChoosing and fitting this size
ISO 7380 M16 × 100 is a button head (low dome) in M16, 100 mm long under the head, on a 1.5 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, M16 × 1.5 mm takes a 14.5 mm tap drill, and the external thread's minor diameter is 14.16 mm — that is the section carrying the load, not the nominal M16 figure. Thread engagement of at least one times the nominal diameter is what lets the bolt fail before the thread strips.