API 5B Thread Gage

Used for checking API internal & external thread.
Conform to: API 5B. CSG,LCSG,LP,BCSG,TBG,UPTBG

API Thread Gauges(Product Numbers: RGPG-12001):

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″

Gauge code	Outer Dia	Pitch/	Taper	Form angle
Gauge code	Outer Dia	per25.4mm	Taper	Form angle
4 1/2 (CSG,LCSG)	114.3	3.175(8)	1:16	60°
5 (CSG,LCSG)	127	3.175(8)
5 1/2 (CSG,LCSG)	139.7	3.175(8)
6 5/8 (CSG,LCSG)	168.28	3.175(8)
7 (CSG,LCSG)	177.8	3.175(8)
7 5/8 (CSG,LCSG)	193.68	3.175(8)
8 5/8 (CSG,LCSG)	219.08	3.175(8)
9 5/8 (CSG,LCSG)	244.48	3.175(8)
10 3/4 (CSG,LCSG)	273.05	3.175(8)
11 3/4 (CSG,LCSG)	298.45	3.175(8)
13 3/8 (CSG,LCSG)	339.73	3.175(8)
16″ (CSG,LCSG)	406.4	3.175(8)
18 5/8 (CSG,LCSG)	473.08	3.175(8)
20″ (CSG,LCSG)	508	3.175(8

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