Nylon Lock Nut Spec Table
A prevailing-torque lock nut with an internal nylon insert that resists vibration loosening and allows reuse.
Practical Notes
- Nylon withstands ~120°C max. Near engines or hot piping, switch to all-metal lock nuts.
- Reusable 3–5 times, but replace immediately if nylon ring is compressed. Always use new for critical joints.
Selection Guide
Prevents vibration loosening via nylon insert friction. Reusable 3–5 times, but use new nuts for critical joints. Nylon withstands ~120°C max; for high temperatures, switch to all-metal prevailing torque lock nuts.
Nylon Lock NutDINISOJISANSINylon Lock Nut
6 sizesThe dimensions below are identical across DIN 985 · ISO 10511 · JIS B 1199 · ASME B18.16.6.
| Nominal | d | P | H (Height) | B (Wrench) | Other |
|---|---|---|---|---|---|
| M4 | 4 | 0.7 | 5 | 7 | 8.1 |
| M5 | 5 | 0.8 | 5 | 8 | 9.2 |
| M6 | 6 | 1 | 6 | 10 | 11.5 |
| M8 | 8 | 1.25 | 8 | 13 | 15 |
| M10 | 10 | 1.5 | 10 | 17 | 19.6 |
| M12 | 12 | 1.75 | 12 | 19 | 21.9 |
Key Features
- Nylon insert at top creates friction on threads to prevent self-loosening
- DIN 985 (thin) / DIN 982 (high) types; torque reduction on reuse must be considered
- Nylon heat limit ~120 °C; all-metal lock nuts required for high-temperature environments
Key Applications
Motor mounts with heavy vibration, vehicle undercarriage, conveyor roller shafts, pump piping, blower installation
STEP File Downloads
Free 3D CAD models (STEP AP214). Built to real standard dimensions; threads are simplified (plain shank) per free-library convention.
FAQ
How many times can nylon lock nuts be reused?
Generally 3–5 times. Replace immediately if nylon ring is compressed or has lost elasticity. Always use new for safety-critical joints.
Can nylon lock nuts be used at high temperatures?
No — nylon withstands only ~120°C. Use all-metal prevailing torque lock nuts for high-temperature applications.