The M6 size of Plain Washer is dimensioned by GB/T 858. 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 858)
| For bolt size | Inner diameter d1 (mm) | Outer diameter d2 (mm) | Thickness t (mm) | Reference standard |
|---|---|---|---|---|
| M6 | 6.4 | 12.0 | 1.6 | ISO 7089 / GB/T 97.1 |
Spanner & Drive for M6 Plain Washer — GB/T 858 (Series 071)
Drive geometry for M6 Plain Washer — GB/T 858 (Series 071) is given by the row above; match the tool to the listed values.
Common Applications for M6 Plain Washer — GB/T 858 (Series 071)
M6 Plain Washer — GB/T 858 (Series 071) are commonly specified for general-purpose load-spreading and locking under machine bolts.
Mating Parts for M6
A M6 flat washer pairs with a M6 bolt/screw and matching M6 nut.
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.