Harshman Gauges offers a unique range of Thread Plug and Ring Gauges, which are used in various industries and manufactured as per different requirement. These gauges range from 1.3 – 210 mm in diameter, the range comprises of MM, BSP, BSW, BSF, BA, BSPT, BS conduit, BS cycle, BSB, NPT, NPTF, UNC, UNF, UNS, UNEF etc. These thread plug gauges are quite durable and used as plugs and inserted into the part to be tested.