When you need Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076) in the M16 size, the controlling values come from GB/T 39 / ISO 4034. This page lists them in one place — pitch, head geometry, tool size and the matching hole.
M16 Dimensional Row (GB/T 39 / ISO 4034)
| Size | Pitch (mm) | Width across flats s (mm) | Nut height m (mm) | Reference standard |
|---|---|---|---|---|
| M16 | 2.0 | 24.0 | 9.0 | GB/T 39 / DIN 562 |
Spanner & Drive for M16 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076)
Drive geometry for M16 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 M16 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076)
M16 Square Nut, Metric — GB/T 39 / ISO 4034 (Series 076) are commonly specified for medium-duty structural joints and motor / chassis mounting.
Mating Parts for M16
Pair M16 with the matching M16 bolt or screw, plus a M16 flat washer where required to distribute load on softer materials.
When to Step Up or Down from M16
When the joint preload approaches the proof load of M16 class 8.8, step up to M20 class 8.8 (or move to M16 class 10.9). When the joint is over-specified, M12 often saves weight and cost without losing the safety margin.