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M12 nut size
19 mm wrench
wrench size for M12 hex nut
M12 hex nut — standard metric hexagonal nut.
Full specification
| System | Metric |
| Nominal diameter | 12 mm |
| Wrench size (across flats) | 19 mm |
| Nut thickness | 10 mm |
| Common grade / class | Class 8 |
About M12 nuts
M12 hex nuts are standard metric hexagonal nuts used with M12 bolts and threaded rods.
The wrench size 19 mm is measured across the flats of the hexagon. The nut thickness is 10 mm.
Class 8 indicates the strength rating. These nuts are suitable for general-purpose applications.
Frequently asked questions
- What size wrench fits M12 nut?
- M12 nut uses a 19 mm wrench.
- How thick is a M12 nut?
- A standard M12 hex nut is 10 mm thick.
- What is the difference between M12 nut classes?
- Class Class 8 indicates the strength rating. Higher numbers mean stronger nuts.