This page covers M24 Hex Flange Nuts to ISO 4161 / DIN 6923: the full dimensional row, hole and tool sizes, proof-load data and typical applications. All values are taken from the governing standards (ISO 4161 / DIN 6923 together with ISO 273, ISO 724 and ISO 898-1 where applicable).
M24 Dimensional Row (ISO 4161 / DIN 6923)
| Size | Pitch (mm) | Flange diameter dc (mm) | Nut height m (mm) | Width across flats s (mm) | Reference standard |
|---|---|---|---|---|---|
| M24 | 3.0 | 51.1 | 24.0 | 36.0 | ISO 4161 / DIN 6923 |
Spanner & Drive for M24 Hex Flange Nuts
M24 Hex Flange Nuts have a width across flats of 36.0 mm — fit a 36.0 mm open-ended spanner or socket. Use a 6-point socket for tight clearances and to reduce rounding; for repeated assembly choose a torque wrench so the joint preload is repeatable.
Common Applications for M24 Hex Flange Nuts
M24 Hex Flange Nuts are commonly specified for structural joints, flange connections and heavy equipment foundations.
Installation Tips for M24 Hex Flange Nuts
- Use a 6-point socket where access allows — 12-point sockets are more prone to rounding the corners on smaller sizes.
- On flanged or serrated variants, do NOT add a separate flat washer — the flange already spreads the load and the washer can defeat the locking serrations.
- At M24 the stretch in the bolt becomes the controlling factor — for critical joints, use angle-controlled or stretch-controlled tightening instead of pure torque.
Mating Parts for M24
Pair M24 with the matching M24 bolt or screw, plus a M24 flat washer where required to distribute load on softer materials.