DIN 931Hexagon headExternal hexagon
DIN 931 M22 × 180 Hexagon head
DIN 931 M22 × 180 is a hexagon head bolt with a 180 mm nominal length, on a M22 × 2.5 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.
Diameter22 mm
Length180 mm
Pitch2.5 mm
Socket size s34 mm
Head height k14 mm
HeadHexagon head
DriveExternal hexagon
Dimensions
- Standard
- DIN 931
- Type
- Hexagon head bolt
- Size
- M22 × 180
- Thread
- M22 × 2.5
- Length L
- 180 mm
- Socket size s
- 34 mm
- Head height k
- 14 mm
- Drive
- External hexagon
- Head
- Hexagon head
Nominal values in millimetres as published in DIN 931. Estimated weight 537.128 g per piece in steel (540.549 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M22 thread pageDesignationM22 × 2.5
Pitch2.5 mm
Major Ø22 mm
Pitch Ø20.38 mm
Minor Ø ext18.93 mm
Tap drillØ 19.5 mm
Other lengthsDIN 931 M22
All M22 specificationsInterchangeability
DIN 931 is catalogued with ISO 4014 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.