API Master and Working Gauges

FYOU PMEC is the leading supplier of gauges for both plug & ring thread gages in china, FYOU PMEC will meet your requirements and custom build your thread gages to meet your exact specifications. Our gage engineering team is ready to design and work with you on all your thread gaging needs; FYOU PMEC provide a complete line of API (American Petroleum Institute) plug and ring gages for(both working & masters):
BCSG CSG NC IF TBG(NU) UP TBG REG FH
4 1/2 BCSG 4 1/2 CSG NC23 2 3/8 IF 2 3/8 TBG (NU) 2 3/8 UP TBG(EUE) 2 3/8 REG 2 7/8 FH
5″BCSG 5″CSG NC26 2 3/7 IF 2 7/8 TBG (NU) 2 7/8 UP TBG(EUE) 2 7/8 REG 3 1/2 FH
5 1/2 BCSG 5 1/2 CSG NC31 3 1/2 IF 3 1/2 TBG (NU) 3 1/2 UP TBG(EUE) 3 1/2 REG 4"FH
6 5/8 BCSG 6 5/8 CSG NC35 4 "IF 4“ TBG (NU) 4 UP TBG(EUE) 4 1/2 REG 4 1/2 FH
7“BCSG 7“CSG NC38 4 1/2 IF 4 1/2 TBG (NU) 4 1/2 UP TBG(EUE) 5 1/2 REG 5 1/2 FH
7 5/8 BCSG 7 5/8 CSG NC40 5 1/2 IF 　 　 6 5/8 REG 6 5/8 FH
8 5/8 BCSG 8 5/8 CSG NC44 　 　 　 7 5/8 REG 　
9 5/8 BCSG 9 5/8 CSG NC46 　 　 　 8 5/8 REG 　
10 3/4 BCSG 10 3/4 CSG NC50 　 　 　 　 　
11 3/4 BCSG 11 3/4 CSG NC56 　 　 　 　 　
13 3/8 BCSG 13 3/8 CSG NC61 　 　 　 　 　
16“BCSG 16“CSG NC70 　 　 　 　 　
18 5/8 BCSG 18 5/8 CSG NC77 　 　 　
20 BCSG 20 CSG