This page covers M36 Hex Nut to GB/T 41 / ISO 4034: the full dimensional row, hole and tool sizes, proof-load data and typical applications. All values are taken from the governing standards (GB/T 41 / ISO 4034 together with ISO 273, ISO 724 and ISO 898-1 where applicable).
M36 Dimensional Row (GB/T 41 / ISO 4034)
| Size | Pitch (mm) | Width across flats s (mm) | Width across corners e (mm) | Nut height m (mm) | Reference standard |
|---|---|---|---|---|---|
| M36 | 4.0 | 55.0 | 60.79 | 31.0 | ISO 4032 / GB/T 6170 |
Spanner & Drive for M36 Hex Nut — GB/T 41 / ISO 4034 (Series 060)
M36 Hex Nut — GB/T 41 / ISO 4034 (Series 060) have a width across flats of 55.0 mm — fit a 55.0 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 M36 Hex Nut — GB/T 41 / ISO 4034 (Series 060)
M36 Hex Nut — GB/T 41 / ISO 4034 (Series 060) are commonly specified for structural joints, flange connections and heavy equipment foundations.
Installation Tips for M36 Hex Nut — GB/T 41 / ISO 4034 (Series 060)
- 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 M36 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 M36
Pair M36 with the matching M36 bolt or screw, plus a M36 flat washer where required to distribute load on softer materials.