M14 Hex Nut (GB/T 6170 / ISO 4032) are specified by thread size, length and head dimensions. The M14 row from the standard is reproduced below, followed by the drill sizes, spanner size and torque values used when installing this size.
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 061)
M14 Hex Nut — GB/T 6170 / ISO 4032 (Series 061) 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 061)
M14 Hex Nut — GB/T 6170 / ISO 4032 (Series 061) are commonly specified for medium-duty structural joints and motor / chassis mounting.
Installation Tips for M14 Hex Nut — GB/T 6170 / ISO 4032 (Series 061)
- 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.