ISO 4029HeadlessHexagon socket
ISO 4029 M12 × 40 Headless
ISO 4029 M12 × 40 is a socket set screw with a 40 mm nominal length, on a M12 × 1.5 mm metric thread. ISO equivalent of DIN 916, same cup point geometry and socket sizes.
Diameter12 mm
Length40 mm
Pitch1.5 mm
Socket size s6 mm
HeadHeadless
DriveHexagon socket
Dimensions
- Standard
- ISO 4029
- Type
- Socket set screw
- Size
- M12 × 40
- Thread
- M12 × 1.5
- Length L
- 40 mm
- Socket size s
- 6 mm
- Drive
- Hexagon socket
- Head
- Headless
Nominal values in millimetres as published in ISO 4029. Estimated weight 35.513 g per piece in steel (35.739 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M12 thread pageDesignationM12 × 1.5 fine
Pitch1.5 mm
Major Ø12 mm
Pitch Ø11.03 mm
Minor Ø ext10.16 mm
Tap drillØ 10.5 mm
Other lengthsISO 4029 M12
All M12 specificationsInterchangeability
ISO 4029 is catalogued with DIN 916 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.