ISO 4017Hexagon headExternal hexagon
ISO 4017 M20 × 80 Hexagon head
ISO 4017 M20 × 80 is a hexagon head bolt with a 80 mm nominal length, on a M20 × 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.
Diameter20 mm
Length80 mm
Pitch1.5 mm
Socket size s30 mm
Head height k12.5 mm
HeadHexagon head
DriveExternal hexagon
Dimensions
- Standard
- ISO 4017
- Type
- Hexagon head bolt
- Size
- M20 × 80
- Thread
- M20 × 1.5
- Length L
- 80 mm
- Socket size s
- 30 mm
- Head height k
- 12.5 mm
- Drive
- External hexagon
- Head
- Hexagon head
Nominal values in millimetres as published in ISO 4017. Estimated weight 197.292 g per piece in steel (198.549 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M20 thread pageDesignationM20 × 1.5 fine
Pitch1.5 mm
Major Ø20 mm
Pitch Ø19.03 mm
Minor Ø ext18.16 mm
Tap drillØ 18.5 mm
Other lengthsISO 4017 M20
All M20 specificationsInterchangeability
ISO 4017 is catalogued with DIN 933 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.