The M14 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.
M14 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 |
|---|---|---|---|---|---|
| M14 | 2.0 | 21.0 | 23.36 | 12.8 | ISO 4032 / GB/T 6170 |
Spanner & Drive for M14 Hex Nut — GB/T 6170 / ISO 4032 (Series 059)
M14 Hex Nut — GB/T 6170 / ISO 4032 (Series 059) have a width across flats of 21.0 mm — fit a 21.0 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 M14 Hex Nut — GB/T 6170 / ISO 4032 (Series 059)
M14 Hex Nut — GB/T 6170 / ISO 4032 (Series 059) are commonly specified for medium-duty structural joints and motor / chassis mounting.
Installation Tips for M14 Hex Nut — GB/T 6170 / ISO 4032 (Series 059)
- 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 M14
Pair M14 with the matching M14 bolt or screw, plus a M14 flat washer where required to distribute load on softer materials.