Selecting Tab Lock Washer for Round Nut — GB/T 858 (Series 073), M12, in GB/T 858: the dimensional row from the standard plus the tools and hole sizes follow. Use them with the technical drawing below — the drawing redraws to the exact size you pick.
M12 Dimensional Row (GB/T 858)
| For shaft / nut size | Inner diameter d1 (mm) | Outer diameter d2 (mm) | Thickness t (mm) | Tab length (mm) | Reference standard |
|---|---|---|---|---|---|
| M12 | 12.5 | 25 | 1.0 | 9 | GB/T 858 |
Spanner & Drive for M12 Tab Lock Washer for Round Nut — GB/T 858 (Series 073)
Drive geometry for M12 Tab Lock Washer for Round Nut — GB/T 858 (Series 073) is given by the row above; match the tool to the listed values.
Common Applications for M12 Tab Lock Washer for Round Nut — GB/T 858 (Series 073)
M12 Tab Lock Washer for Round Nut — GB/T 858 (Series 073) are commonly specified for medium-duty structural joints.
Mating Parts for M12
A M12 flat washer pairs with a M12 bolt/screw and matching M12 nut.
When to Step Up or Down from M12
When the joint preload approaches the proof load of M12 class 8.8, step up to M16 class 8.8 (or move to M12 class 10.9). When the joint is over-specified, M10 often saves weight and cost without losing the safety margin.