For Hex Thick Nut — DIN 6330 / GB/T 56 (Series 052), the M16 thread sits in the medium range of the catalog and is one of the most-asked hex thick nut — din 6330 / gb/t 56 (series 052) in this family. The dimensional and assembly data follow.
M16 Dimensional Row (DIN 6330 / GB/T 56)
| Size | Pitch (mm) | Width across flats s (mm) | Width across corners e (mm) | Nut height m (mm) | Reference standard |
|---|---|---|---|---|---|
| M16 | 2.0 | 24.0 | 26.75 | 14.8 | ISO 4032 / GB/T 6170 |
Spanner & Drive for M16 Hex Thick Nut — DIN 6330 / GB/T 56 (Series 052)
M16 Hex Thick Nut — DIN 6330 / GB/T 56 (Series 052) have a width across flats of 24.0 mm — fit a 24.0 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 M16 Hex Thick Nut — DIN 6330 / GB/T 56 (Series 052)
M16 Hex Thick Nut — DIN 6330 / GB/T 56 (Series 052) are commonly specified for medium-duty structural joints and motor / chassis mounting.
Installation Tips for M16 Hex Thick Nut — DIN 6330 / GB/T 56 (Series 052)
- 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.
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.