Shaan Xi Aviation Hong Feng Precision Mechanical Tool Corporation,Which pertains to China Aviation industry second group,is the only base of scienific research and production for thread instrument and measuring tools in china aviation industry. Maine premium gauge product is:Number style gauge. Regular style gauge. Full-holl style gauge ,Integral-joint Tubing thread gauge, Casing round thread gauge, Buttress casing thread buuuress,line pipe thread gauge. Has passed the API Monogram, got the API Spec 5B and API Spec 7 certification.
Website：www.hfmtc.com.cn