DIN 985Nylon insert lock nutExternal hexagon
DIN 985 M8 Nylon insert lock nut
DIN 985 M8 is a nylon insert lock nut, on a M8 × 1 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.
Diameter8 mm
Pitch1 mm
Socket size s13 mm
Thickness h9.9 mm
Height m9.5 mm
DriveExternal hexagon
Dimensions
- Standard
- DIN 985
- Type
- Nylon insert lock nut
- Size
- M8
- Thread
- M8 × 1
- Socket size s
- 13 mm
- Height m
- 9.5 mm
- Total height h
- 9.9 mm
- Drive
- External hexagon
Nominal values in millimetres as published in DIN 985. Estimated weight 4.437 g per piece in steel (4.465 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M8 thread pageDesignationM8 × 1 fine
Pitch1 mm
Major Ø8 mm
Pitch Ø7.35 mm
Minor Ø ext6.77 mm
Tap drillØ 7 mm
Other lengthsDIN 985 M8
All M8 specificationsInterchangeability
DIN 985 is catalogued with ISO 10511 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.