I need to re-thread the final drive stud bolt, does anyone know the thread pitch for it?  Is it 1.75 or 1.50?

Pitch gauges... I thought I was the only one here who still uses those!

Dai wrote:Pitch gauges... I thought I was the only one here who still uses those!

Pitch gauges might help you to determine the pitch thread, but it will NOT tell you the pitch type, which in this case turned out to be a coarse thread. In the U.S., M12-1.5 coarse thread is NOT common.

bmwk100rs wrote:Pitch gauges might help you to determine the pitch thread, but it will NOT tell you the pitch type, which in this case turned out to be a coarse thread.

Pitch type is a comparative and relative description of thread length determined by the number of threads in a given length.  That is determined using a pitch gauge. With bolts of the same diameter, the bolt with a coarser thread will have fewer threads in a given length than the fine thread bolt. To determine the correct bolt for the threaded hole, you can compare threads with a pitch gauge to narrow your search or you can just find bolts and try them one after another to see if they be fully installed without cross-threading.