The M10 size of Hex Nuts, Grade C is dimensioned by ISO 4034. 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.
M10 Dimensional Row (ISO 4034)
| Size | Pitch (mm) | Width across flats s (mm) | Width across corners e min (mm) | Nut height m (mm) | Product grade | Reference standard |
|---|---|---|---|---|---|---|
| M10 | 1.5 | 17.0 | 18.72 | 8.4 | Grade C | ISO 4034 / DIN 555 |
Spanner & Drive for M10 Hex Nuts, Grade C
M10 Hex Nuts, Grade C have a width across flats of 17.0 mm — fit a 17.0 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 M10 Hex Nuts, Grade C
M10 Hex Nuts, Grade C are commonly specified for general-purpose joints in machinery, fixturing and equipment frames.
Installation Tips for M10 Hex Nuts, Grade C
- 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 M10
When the joint preload approaches the proof load of M10 class 8.8, step up to M12 class 8.8 (or move to M10 class 10.9). When the joint is over-specified, M8 often saves weight and cost without losing the safety margin.