On the bench specifying M4 Spring Lock Washer — GB/T 93 / DIN 127B (Series 080)? This page gives the controlling dimensions for the M4 size of Spring Lock Washer — GB/T 93 / DIN 127B (Series 080) (to GB/T 93 / DIN 127B).
M4 Dimensional Row (GB/T 93 / DIN 127B)
| For bolt size | Inner diameter d1 (mm) | Outer diameter d2 (mm) | Width b (mm) | Thickness t (mm) | Reference standard |
|---|---|---|---|---|---|
| M4 | 4.1 | 7.6 | 1.2 | 1.0 | GB/T 93 / DIN 127B |
Spanner & Drive for M4 Spring Lock Washer — GB/T 93 / DIN 127B (Series 080)
Drive geometry for M4 Spring Lock Washer — GB/T 93 / DIN 127B (Series 080) is given by the row above; match the tool to the listed values.
Common Applications for M4 Spring Lock Washer — GB/T 93 / DIN 127B (Series 080)
M4 Spring Lock Washer — GB/T 93 / DIN 127B (Series 080) are commonly specified for small electronics hardware and precision assemblies.
Installation Tips for M4 Spring Lock Washer — GB/T 93 / DIN 127B (Series 080)
- At M4 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 M4
A M4 flat washer pairs with a M4 bolt/screw and matching M4 nut.
When to Step Up or Down from M4
When the joint preload approaches the proof load of M4 class 8.8, step up to M5 class 8.8 (or move to M4 class 10.9). When the joint is over-specified, M3 often saves weight and cost without losing the safety margin.