For Spring Lock Washers, the M5 thread sits in the small-to-medium range of the catalog and is one of the most-asked spring lock washers in this family. The dimensional and assembly data follow.
M5 Dimensional Row (ISO 7980 / DIN 127)
| For bolt size | Inner diameter d1 min (mm) | Outer diameter d2 max (mm) | Width b (mm) | Thickness s (mm) | Reference standard |
|---|---|---|---|---|---|
| M5 | 5.1 | 9.2 | 3.0 | 1.2 | ISO 7980 / DIN 127 |
Spanner & Drive for M5 Spring Lock Washers
Drive geometry for M5 Spring Lock Washers is given by the row above; match the tool to the listed values.
Common Applications for M5 Spring Lock Washers
M5 Spring Lock Washers are commonly specified for small electronics hardware and precision assemblies.
Installation Tips for M5 Spring Lock Washers
- 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.