The M36 size of Hex Nut is dimensioned by GB/T 6170 / ISO 4032. The tables below give the dimensional row from the standard, the drill and spanner sizes that go with it, and the assembly torque per property class. The technical drawing on this page redraws to the exact values selected.
M36 Dimensional Row (GB/T 6170 / ISO 4032)
| 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 6170 / ISO 4032 (Series 066)
M36 Hex Nut — GB/T 6170 / ISO 4032 (Series 066) 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 6170 / ISO 4032 (Series 066)
M36 Hex Nut — GB/T 6170 / ISO 4032 (Series 066) are commonly specified for structural joints, flange connections and heavy equipment foundations.
Installation Tips for M36 Hex Nut — GB/T 6170 / ISO 4032 (Series 066)
- 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.