Nylon Insert Lock Nut
Prevailing-torque hexagon nut with a nylon insert — ISO 7719.
| Designation | d | Pitch | m (min–max) | s | e | dw | Weight /100 | Note |
|---|---|---|---|---|---|---|---|---|
| M5 common | 5.0 | 0.8 | 4.8–5.3 | 8.0 | 8.79 | 6.9 | 0.082 kg | Nylon insert — not recommended for reuse after removal. |
| M6 common | 6.0 | 1 | 5.4–5.9 | 10.0 | 11.05 | 8.9 | 0.147 kg | Nylon insert — not recommended for reuse after removal. |
| M8 common | 8.0 | 1.25 | 6.44–7.1 | 13.0 | 14.38 | 11.6 | 0.320 kg | Nylon insert — not recommended for reuse after removal. |
| M10 common | 10.0 | 1.5 | 8.04–9 | 16.0 | 17.77 | 14.6 | 0.588 kg | Nylon insert — not recommended for reuse after removal. |
| M12 common | 12.0 | 1.75 | 10.37–11.6 | 18.0 | 20.03 | 16.6 | 1.005 kg | Nylon insert — not recommended for reuse after removal. |
| M14 | 14.0 | 2 | 12.1–13.2 | 21.0 | 23.36 | 19.6 | 1.554 kg | Nylon insert — not recommended for reuse after removal. |
| M16 common | 16.0 | 2 | 14.1–15.2 | 24.0 | 26.75 | 22.5 | 2.318 kg | Nylon insert — not recommended for reuse after removal. |
| M18 | 18.0 | 2.5 | 15.1–17 | 27.0 | 29.56 | 24.9 | 3.201 kg | ISO 7719 property class B (wider tolerances, sizes ≥ M18). |
| M20 common | 20.0 | 2.5 | 16.9–19 | 30.0 | 32.95 | 27.7 | 4.411 kg | ISO 7719 property class B (wider tolerances, sizes ≥ M18). |
| M22 | 22.0 | 2.5 | 18.1–21 | 34.0 | 37.29 | 31.4 | 6.201 kg | ISO 7719 property class B (wider tolerances, sizes ≥ M18). |
| M24 common | 24.0 | 3 | 20.2–23 | 36.0 | 39.55 | 33.3 | 7.858 kg | ISO 7719 property class B (wider tolerances, sizes ≥ M18). |
| M30 common | 30.0 | 3.5 | 24.3–26.9 | 46.0 | 50.85 | 42.8 | 15.670 kg | ISO 7719 property class B (wider tolerances, sizes ≥ M18). |
| M36 common | 36.0 | 4 | 29.4–32.5 | 55.0 | 60.79 | 51.1 | 27.500 kg | ISO 7719 property class B (wider tolerances, sizes ≥ M18). |
No sizes match your search.
All dimensions in mm. Weight figures are indicative (steel), per 100 pieces.
Glossary
- d
- Nominal (major) diameter
- m
- Nut height
- s
- Wrench size (across flats)
- e
- Circumscribed diameter (across corners)
- dw
- Bearing face diameter
Frequently asked questions
What standard governs the nylon insert lock nut?
ISO 7719 — the dimensions in the table below (nominal diameter, thread pitch and all fixed geometry) are taken directly from that standard.
Are these dimensions in millimetres?
Yes — all values are in mm, matching the metric ISO/UNI standards these components are drawn from. There are no imperial variants in this table.
Why do some sizes have a note about property class B?
Above a certain size, these nuts are commonly produced to a coarser property class (B instead of A) — wider manufacturing tolerances, still fully compliant with the standard. It only affects manufacturing tolerance, not how you use the nut.
References & further reading
- ISO 7719:2012 — Prevailing torque type all-metal hexagon regular nuts — the source standard for the dimensions in this table.
- Nut (hardware) — Wikipedia — general background and terminology.
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