The M6 size of Square Nut, Metric is dimensioned by GB/T 39 / ISO 4034. The tables below give the dimensional row from the standard, the drill and spanner sizes that go with it, and the assembly torque per property class. The technical drawing on this page redraws to the exact values selected.
M6 Dimensional Row (GB/T 39 / ISO 4034)
| Size | Pitch (mm) | Width across flats s (mm) | Nut height m (mm) | Reference standard |
|---|---|---|---|---|
| M6 | 1.0 | 10.0 | 3.6 | GB/T 39 / DIN 562 |
Spanner & Drive for M6 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076)
Drive geometry for M6 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076) is given by the row above; match the tool to the listed values.
Common Applications for M6 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076)
M6 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 M6
Pair M6 with the matching M6 bolt or screw, plus a M6 flat washer where required to distribute load on softer materials.
When to Step Up or Down from M6
When the joint preload approaches the proof load of M6 class 8.8, step up to M8 class 8.8 (or move to M6 class 10.9). When the joint is over-specified, M5 often saves weight and cost without losing the safety margin.