How To: Bolt Size and Thread Pitch Identification

Per a request from HuskyT.

A quick blub in how to id bolt diameter and thread pitch.

Gotta have this tool. Buy it at your local hardware store or nut/bolt supplier. 7 or $8.00. With this tool you can measure diameter, pitch and length for any bolt on our bikes. The tool measures diameter of the bolt via the holes. Thread pitch is measured via the built in metric pitch guage. Length is measured by the metric ruler opposite the "pitch" side. Same tool works for identifying American bolts also.

For example: 81' swingarm bolt is 12mm diameter w/ a 1.0 pitch. (Sorry about the glare in photo 4) The 1.0 pitch can be seen in photo 3. Length for this bolt would be done w/ a tape measure b/c its too long for this guage.

Found one of those in my father in law's tools. Kinda knew it would come in handy some day.

Appropriation at its finest. Takes the guess work out of size and pitch questions. Use it all the time.

stupid question maybe but can you use this tool to measure the hole? Assuming you lost the bolt and intend to size the replacement...