DIN 933Hexagon headExternal hexagon
DIN 933 M4 × 25 Hexagon head
DIN 933 M4 × 25 is a hexagon head bolt with a 25 mm nominal length, on a M4 × 0.7 mm metric thread. A hexagon head fastener threaded all the way to the head. Glyph marking on the head identifies the property class, normally 8.8, 10.9 or A2-70.
Diameter4 mm
Length25 mm
Pitch0.7 mm
Socket size s7 mm
Head height k2.8 mm
HeadHexagon head
DriveExternal hexagon
Dimensions
- Standard
- DIN 933
- Type
- Hexagon head bolt
- Size
- M4 × 25
- Thread
- M4 × 0.7
- Length L
- 25 mm
- Socket size s
- 7 mm
- Head height k
- 2.8 mm
- Drive
- External hexagon
- Head
- Hexagon head
Nominal values in millimetres as published in DIN 933. Estimated weight 2.466 g per piece in steel (2.482 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M4 thread pageDesignationM4 × 0.7
Pitch0.7 mm
Major Ø4 mm
Pitch Ø3.55 mm
Minor Ø ext3.14 mm
Tap drillØ 3.3 mm
Other lengthsDIN 933 M4
All M4 specificationsInterchangeability
DIN 933 is catalogued with ISO 4017 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.