ISO 4017Hexagon headExternal hexagon
ISO 4017 M18 × 40 Hexagon head
ISO 4017 M18 × 40 is a hexagon head bolt with a 40 mm nominal length, on a M18 × 1.5 mm metric thread. ISO version of the full thread hexagon head screw. Head dimensions are dimensionally compatible with DIN 933 for the same nominal size.
Diameter18 mm
Length40 mm
Pitch1.5 mm
Socket size s27 mm
Head height k11.5 mm
HeadHexagon head
DriveExternal hexagon
Dimensions
- Standard
- ISO 4017
- Type
- Hexagon head bolt
- Size
- M18 × 40
- Thread
- M18 × 1.5
- Length L
- 40 mm
- Socket size s
- 27 mm
- Head height k
- 11.5 mm
- Drive
- External hexagon
- Head
- Hexagon head
Nominal values in millimetres as published in ISO 4017. Estimated weight 79.903 g per piece in steel (80.412 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M18 thread pageDesignationM18 × 1.5 fine
Pitch1.5 mm
Major Ø18 mm
Pitch Ø17.03 mm
Minor Ø ext16.16 mm
Tap drillØ 16.5 mm
Other lengthsISO 4017 M18
All M18 specificationsInterchangeability
ISO 4017 is catalogued with DIN 933 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.