Measuring Pin Box By Nirghosh Engineering

Gauge dimensions are based on the minimum outside diameter (OD) tolerance of the inspected part. Double-ended go/no-go gauges include a go gauge pin on one end of a handle and a no-go gauge pin on the opposite end.

Progressive or step go/no-go gauges have stepped pins with the go gauge surface and the no-go gauge surface on the same side of the handle. Master gauge blocks, master or setting discs, and setting rings are master gauges used to calibrate or set working plug or pin gauges.

Pin gauges include plug size or diameter, set range, and set steps or increments. Suppliers specify products according to metric or English (imperial) measurements.
Tolerance class is an important consideration. Class XX gauges range in size from .001 in. to 0.08250 in. and have a tolerance of no more than 0.00002 in. Class X gauges range in size from .001 in. to 0.08250 in. and have a tolerance of no more than 0.00004 in. Class Y gauges range in size from .001 in. to 0.08250 in