DIN 931Hexagon headExternal hexagon
DIN 931 M24 × 140 Hexagon head
DIN 931 M24 × 140 is a hexagon head bolt with a 140 mm nominal length, on a M24 × 2 mm metric thread. Same head as DIN 933 but with an unthreaded shank under the head. The plain shank carries shear load, which is why these are preferred for structural steelwork and machinery frames.
Diameter24 mm
Length140 mm
Pitch2 mm
Socket size s36 mm
Head height k15 mm
HeadHexagon head
DriveExternal hexagon
Dimensions
- Standard
- DIN 931
- Type
- Hexagon head bolt
- Size
- M24 × 140
- Thread
- M24 × 2
- Length L
- 140 mm
- Socket size s
- 36 mm
- Head height k
- 15 mm
- Drive
- External hexagon
- Head
- Hexagon head
Nominal values in millimetres as published in DIN 931. Estimated weight 497.176 g per piece in steel (500.343 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M24 thread pageDesignationM24 × 2 fine
Pitch2 mm
Major Ø24 mm
Pitch Ø22.7 mm
Minor Ø ext21.55 mm
Tap drillØ 22 mm
Other lengthsDIN 931 M24
All M24 specificationsInterchangeability
DIN 931 is catalogued with ISO 4014 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.