M5 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076) is the m5-thread variant of Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076) manufactured to GB/T 39 / ISO 4034. This page focuses on the data engineers reach for at the bench: dimensional values for the M5 size, the spanner/drive that fits, and the assembly data you need to install it.
M5 Dimensional Row (GB/T 39 / ISO 4034)
| Size | Pitch (mm) | Width across flats s (mm) | Nut height m (mm) | Reference standard |
|---|---|---|---|---|
| M5 | 0.8 | 8.0 | 2.7 | GB/T 39 / DIN 562 |
Spanner & Drive for M5 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076)
Drive geometry for M5 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076) is given by the row above; match the tool to the listed values.
Common Applications for M5 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076)
M5 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076) are commonly specified for paired with the same-size screws on PCB hardware, light enclosures and small-scale assemblies.
Installation Tips for M5 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076)
- 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
Pair M5 with the matching M5 bolt or screw, plus a M5 flat washer where required to distribute load on softer materials.
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.