A general flat washer — gb/t 97.1 / iso 7089 (series 087 in M5: this guide pulls the row from the standard, adds the assembly numbers an engineer actually uses, and links you straight to a quote.
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 General Flat Washer — GB/T 97.1 / ISO 7089 (Series 087)
Drive geometry for M5 General Flat Washer — GB/T 97.1 / ISO 7089 (Series 087) is given by the row above; match the tool to the listed values.
Common Applications for M5 General Flat Washer — GB/T 97.1 / ISO 7089 (Series 087)
M5 General Flat Washer — GB/T 97.1 / ISO 7089 (Series 087) are commonly specified for small electronics hardware and precision assemblies.
Installation Tips for M5 General Flat Washer — GB/T 97.1 / ISO 7089 (Series 087)
- 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.