Harshman Gauges offers Thread Ring Gauges which are available in a diameter range of 1.3-200 mm. The wide range of thread ring gauges comprises of MM, BSP, BSW, BSF, BA, BSPT, BS conduit, BS cycle, BSB, NPT,NPTF, UNC, UNF, UNS, UNEF etc. The company also offers Go-Nogo type special purpose gauges squareness, concentricity, and depth checking, flush pin Gauges exactly in accordance with the drawings provided.