ISO 10511Nylon insert lock nutExternal hexagon
ISO 10511 M20 Nylon insert lock nut
ISO 10511 M20 is a nylon insert lock nut, on a M20 × 1.5 mm metric thread. ISO equivalent of DIN 985. Reuse is limited — the prevailing torque drops each time the insert is run over the thread.
Diameter20 mm
Pitch1.5 mm
Socket size s30 mm
Thickness h25 mm
Height m22 mm
DriveExternal hexagon
Dimensions
- Standard
- ISO 10511
- Type
- Nylon insert lock nut
- Size
- M20
- Thread
- M20 × 1.5
- Socket size s
- 30 mm
- Height m
- 22 mm
- Total height h
- 25 mm
- Drive
- External hexagon
Nominal values in millimetres as published in ISO 10511. Estimated weight 46.696 g per piece in steel (46.994 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 10511 M20
All M20 specificationsInterchangeability
ISO 10511 is catalogued with DIN 985 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.