DIN 985Nylon insert lock nutExternal hexagon
DIN 985 M3 Nylon insert lock nut
DIN 985 M3 is a nylon insert lock nut, on a M3 × 0.5 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.
Diameter3 mm
Pitch0.5 mm
Socket size s5.5 mm
Thickness h4.5 mm
Height m4 mm
DriveExternal hexagon
Dimensions
- Standard
- DIN 985
- Type
- Nylon insert lock nut
- Size
- M3
- Thread
- M3 × 0.5
- Socket size s
- 5.5 mm
- Height m
- 4 mm
- Total height h
- 4.5 mm
- Drive
- External hexagon
Nominal values in millimetres as published in DIN 985. Estimated weight 0.395 g per piece in steel (0.397 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M3 thread pageDesignationM3 × 0.5
Pitch0.5 mm
Major Ø3 mm
Pitch Ø2.68 mm
Minor Ø ext2.39 mm
Tap drillØ 2.5 mm
Other lengthsDIN 985 M3
All M3 specificationsInterchangeability
DIN 985 is catalogued with ISO 10511 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.