On the bench specifying M5 Plain Washer — GB/T 858 (Series 071)? This page gives the controlling dimensions for the M5 size of Plain Washer — GB/T 858 (Series 071) (to GB/T 858).
M5 Dimensional Row (GB/T 858)
| For bolt size | Inner diameter d1 (mm) | Outer diameter d2 (mm) | Thickness t (mm) | Reference standard |
|---|---|---|---|---|
| M5 | 5.3 | 10.0 | 1.0 | ISO 7089 / GB/T 97.1 |
Spanner & Drive for M5 Plain Washer — GB/T 858 (Series 071)
Drive geometry for M5 Plain Washer — GB/T 858 (Series 071) is given by the row above; match the tool to the listed values.
Common Applications for M5 Plain Washer — GB/T 858 (Series 071)
M5 Plain Washer — GB/T 858 (Series 071) are commonly specified for small electronics hardware and precision assemblies.
Installation Tips for M5 Plain Washer — GB/T 858 (Series 071)
- At M5 the joint is sensitive to over-torque — use a torque-limiting driver and check the head doesn't bury into a softer counterpart.
Mating Parts for M5
A M5 flat washer pairs with a M5 bolt/screw and matching M5 nut.
When to Step Up or Down from M5
When the joint preload approaches the proof load of M5 class 8.8, step up to M6 class 8.8 (or move to M5 class 10.9). When the joint is over-specified, M4 often saves weight and cost without losing the safety margin.