M5 Flat Plain Washer (GB/T 95) are manufactured to GB/T 97.1 / ISO 7089 with a coarse thread pitch of 0.8 mm. This page lists the controlling dimensions for the M5 size — head geometry, width across flats, matching spanner size — together with the clearance hole, tapping drill and tightening torque used at assembly.
M5 Dimensional Row (GB/T 97.1 / ISO 7089)
| 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 Flat Plain Washer (GB/T 95) — GB/T 97.1 / ISO 7089 (Series 086)
Drive geometry for M5 Flat Plain Washer (GB/T 95) — GB/T 97.1 / ISO 7089 (Series 086) is given by the row above; match the tool to the listed values.
Common Applications for M5 Flat Plain Washer (GB/T 95) — GB/T 97.1 / ISO 7089 (Series 086)
M5 Flat Plain Washer (GB/T 95) — GB/T 97.1 / ISO 7089 (Series 086) are commonly specified for small electronics hardware and precision assemblies.
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.