M3 Nylon Insert Hex Lock Nut (Type 2) (GB/T 6182 / ISO 10513) are specified by thread size, length and head dimensions. The M3 row from the standard is reproduced below, followed by the drill sizes, spanner size and torque values used when installing this size.
M3 Dimensional Row (GB/T 6182 / ISO 10513)
| Size | Pitch (mm) | Width across flats s (mm) | Width across corners e (mm) | Total height m (mm) | Reference standard |
|---|---|---|---|---|---|
| M3 | 0.5 | 5.5 | 6.01 | 4.0 | ISO 7040 / DIN 985 |
Spanner & Drive for M3 Nylon Insert Hex Lock Nut (Type 2) — GB/T 6182 / ISO 10513 (Series 051)
Drive geometry for M3 Nylon Insert Hex Lock Nut (Type 2) — GB/T 6182 / ISO 10513 (Series 051) is given by the row above; match the tool to the listed values.
Common Applications for M3 Nylon Insert Hex Lock Nut (Type 2) — GB/T 6182 / ISO 10513 (Series 051)
M3 Nylon Insert Hex Lock Nut (Type 2) — GB/T 6182 / ISO 10513 (Series 051) are commonly specified for paired with the same-size screws on PCB hardware, light enclosures and small-scale assemblies.
Mating Parts for M3
Pair M3 with the matching M3 bolt or screw, plus a M3 flat washer where required to distribute load on softer materials.
When to Step Up or Down from M3
When the joint preload approaches the proof load of M3 class 8.8, step up to M4 class 8.8 (or move to M3 class 10.9). When the joint is over-specified, M2 often saves weight and cost without losing the safety margin.