Gaugestools is a leading thread gauge supplier and manufacturer located in China. We can provide a variety of Metric thread gauges, UN thread gauges, ACME thread gauges, NPT thread gauges, BSP thread gauges, etc. Gaugestools is a specialist manufacturer and supplier of high-precision thread gauges and taps. They highlight a wide product portfolio, including metric threads, UN/UNF/UNC, ACME, NPT, BSPP and more. We emphasise rigorous quality control, calibration via ISO 17025-accredited labs, and flexible custom production even for ****gle units. We are a professional manufacturer and supplier of thread ring gauges and thread plug gauges, including GO / NOGO , RH/LH( right hand and left hand). We have rich ranges of thread gauges, which include UN (UN,UNC,UNF,UNS,UNEF), Metric, ACME, BSPP (G), BSPT(R), NPT, NPTF, T****zoidal, MJ, UNJ, UNJC, UNJF, UNJEF, UNJS, etc. We not only have thread gauges, but also have plain gauges.