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How to Measure a Lock Nut

No vernier caliper? No Problem a ruler will do the job.

If you measured at 50mm the size is 50 divided by 5, this gives us an 10 sized lock nut , 30mm would give us an 6 sized lock nut (30/5=6).

Measuring a lock nut with a ruler

To measure a lock nut simply measure it's bore and then divide the measurement by 5.

eg: 50mm divided by 5 = 10 so the size is a 10 sized nut eg: MB10, KMFE 10 etc

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