Bench Micrometer

A bench micrometer is a type of gauge or tool used for inspection which typically resides on a work bench that measures length whose accuracy and precision is approximately 20 micro-inches (0.5 microns).

The External Supermicrometer Model C is the most widely used bench micrometer that can measure just about any manufactured precision part or gage such as pins, plugs, and all types of threads including: API, NPT, NPTF, Dryseal, BSPP, BSPT, UN (Unified), M Profile (Metric), ACME, Buttress, UTS, UNC, UNF, UNEF, UNS, BSW (Whitworth), BA, BSC, BSF, BSP.  The External Supermicrometer Model C is also the industry standard, 3-Wire Thread Measuring System.