When you need Square Nuts in the M12 size, the controlling values come from DIN 557. This page lists them in one place — pitch, head geometry, tool size and the matching hole.
M12 Dimensional Row (DIN 557)
| Size | Pitch (mm) | Width across flats s (mm) | Width across corners e min (mm) | Nut height m (mm) | Reference standard | Notes |
|---|---|---|---|---|---|---|
| M12 | 1.75 | 19.0 | 26.5 | 10.0 | DIN 557 / DIN 562 | Square nut, general / channel use |
Spanner & Drive for M12 Square Nuts
Drive geometry for M12 Square Nuts is given by the row above; match the tool to the listed values.
Common Applications for M12 Square Nuts
M12 Square Nuts are commonly specified for medium-duty structural joints and motor / chassis mounting.
Mating Parts for M12
Pair M12 with the matching M12 bolt or screw, plus a M12 flat washer where required to distribute load on softer materials.
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.