Dimensional and assembly data for M6 Thin Hex Nut to GB/T 6172.1 / ISO 4035. Includes head size and width across flats, clearance-hole and tapping-drill diameters, tightening torque per property class, and the sizes to step up or down to when the joint requires it.
M6 Dimensional Row (GB/T 6172.1 / ISO 4035)
| Size | Pitch (mm) | Width across flats s (mm) | Width across corners e (mm) | Nut height m (mm) | Reference standard |
|---|---|---|---|---|---|
| M6 | 1.0 | 10.0 | 11.05 | 3.2 | ISO 4035 / GB/T 6172 |
Spanner & Drive for M6 Thin Hex Nut — GB/T 6172.1 / ISO 4035 (Series 055)
M6 Thin Hex Nut — GB/T 6172.1 / ISO 4035 (Series 055) have a width across flats of 10.0 mm — fit a 10.0 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 M6 Thin Hex Nut — GB/T 6172.1 / ISO 4035 (Series 055)
M6 Thin Hex Nut — GB/T 6172.1 / ISO 4035 (Series 055) are commonly specified for general-purpose joints in machinery, fixturing and equipment frames.
Installation Tips for M6 Thin Hex Nut — GB/T 6172.1 / ISO 4035 (Series 055)
- 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.
When to Step Up or Down from M6
When the joint preload approaches the proof load of M6 class 8.8, step up to M8 class 8.8 (or move to M6 class 10.9). When the joint is over-specified, M5 often saves weight and cost without losing the safety margin.