When you need Wedge / Taper Washer — GB/T 852 (Series 084) in the M8 size, the controlling values come from GB/T 852. This page lists them in one place — pitch, head geometry, tool size and the matching hole.
M8 Dimensional Row (GB/T 852)
| For bolt size | Inner diameter d1 (mm) | Outer diameter d2 (mm) | Mean thickness t (mm) | Slope | Reference standard |
|---|---|---|---|---|---|
| M8 | 8.5 | 17 | 3.2 | 1:6 | DIN 6917 / GB/T 853 |
Spanner & Drive for M8 Wedge / Taper Washer — GB/T 852 (Series 084)
Drive geometry for M8 Wedge / Taper Washer — GB/T 852 (Series 084) is given by the row above; match the tool to the listed values.
Common Applications for M8 Wedge / Taper Washer — GB/T 852 (Series 084)
M8 Wedge / Taper Washer — GB/T 852 (Series 084) are commonly specified for general-purpose load-spreading and locking under machine bolts.
Mating Parts for M8
A M8 flat washer pairs with a M8 bolt/screw and matching M8 nut.
When to Step Up or Down from M8
When the joint preload approaches the proof load of M8 class 8.8, step up to M10 class 8.8 (or move to M8 class 10.9). When the joint is over-specified, M6 often saves weight and cost without losing the safety margin.