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 single 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, Trapezoidal, MJ, UNJ, UNJC, UNJF, UNJEF, UNJS, etc. We not only have thread gauges, but also have plain gauges. Our extensive range includes thread ring gages for external thread and thread plug gages for internal thread.