M10 Square Nut, Metric are manufactured to GB/T 39 / ISO 4034. This page lists the controlling dimensions for the M10 size together with the drive and the installation notes for this type.
M10 Dimensional Row (GB/T 39 / ISO 4034)
| Size | Pitch (mm) | Width across flats s (mm) | Nut height m (mm) | Reference standard |
|---|---|---|---|---|
| M10 | 1.5 | 17.0 | 6.0 | GB/T 39 / DIN 562 |
Spanner & Drive for M10 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076)
Drive geometry for M10 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076) is given by the row above; match the tool to the listed values.
Tightening Torque for M10
| Class 8.8 (dry, ~µ 0.125) | ≈ 49 Nm |
|---|---|
| Class 10.9 (dry, ~µ 0.125) | ≈ 69 Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ 83 Nm |
Indicative dry-joint values. Lubrication can lower the required torque by 15–25%. Always confirm against the joint design, especially when going up a strength class.
Proof Load & Strength for M10
| Tensile stress area As (ISO 898-1) | 58 mm² |
|---|---|
| Proof load, class 8.8 | 34 kN |
| Proof load, class 10.9 | 48 kN |
| Proof load, class 12.9 | 56 kN |
| Min. ultimate tensile, class 8.8 | 46 kN |
Proof load = stress area × proof stress per ISO 898-1. Design joints so the working preload stays below the proof load of the selected class.
Common Applications for M10 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076)
M10 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076) are commonly specified for general-purpose joints in machinery, fixturing and equipment frames.
Mating Parts for M10
Pair M10 with the matching M10 bolt or screw, plus a M10 flat washer where required to distribute load on softer materials.
When to Step Up or Down from M10
When the joint preload approaches the proof load of M10 class 8.8, step up to M12 class 8.8 (or move to M10 class 10.9). When the joint is over-specified, M8 often saves weight and cost without losing the safety margin.
