Used for checking API internal & external thread.
Conform to: API 5B.
CSG,LCSG,LP,BCSG,TBG,UPTBG
API Thread Gauges:
Used for checking API internal and external threads.
Spec 5B:
CSG 4-1/2 to 20"
LCSG 4-1/2 to 20"
LP 1/8 to 12"
BCSG 4-1/2 to 6"
TBG1.050 to 4-1/2"
UPTBG 1.050 to 4-1/2"