Shim feeler gauges would be readily available in most shops checking wear on moving parts. 0.0025 inches (0.635mm) was included in the first high quality (gearw

Shim feeler gauges would be readily available in most shops checking wear on moving parts. 0.0025 inches (0.635mm) was included in the first high quality (gearwrench brand) set that I looked up online.