DIN 985Nylon insert lock nutExternal hexagon
DIN 985 M20 Nylon insert lock nut
DIN 985 M20 is a nylon insert lock nut, on a M20 × 1.5 mm metric thread. A full hex nut with a nylon collar that grips the thread and resists vibration loosening. Note that the nylon insert has a temperature limit — above roughly 120 °C it loses its locking effect.
Diameter20 mm
Pitch1.5 mm
Socket size s30 mm
Thickness h25 mm
Height m22 mm
DriveExternal hexagon
Dimensions
- Standard
- DIN 985
- 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 DIN 985. 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 lengthsDIN 985 M20
All M20 specificationsInterchangeability
DIN 985 is catalogued with ISO 10511 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.