API Thread Plug and Ring Gauges, American Plug and Ring Gauges

API Thread Ring Gauge  Thread  Plug Gauge

 We can make all kinds of types Go & No go Gauge according to  customers demand.

 Our gage engineering team is ready to design and work with you on all your thread gaging needs;

We 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

 

 UP TBG, EU       LINE PIPE or LP    ;   DP    UP DP Gauge

API gauge (Casing Round Thread)

Gauge CodeOuter dia. ØTaperGauge CodeOuter dia. ØTaper

4 1/2 (CSG,LCSG)	114.30	1:16	8 5/8 (CSG,LCSG)	219.08	1:16
5 (CSG,LCSG)	127.00		9 5/8 (CSG,LCSG)	244.48
5 1/2 (CSG,LCSG)	139.70		10 3/4 (CSG,LCSG)	273.05
6 5/8 (CSG,LCSG)	168.28		11 3/4 (CSG,LCSG)	298.45
7 (CSG,LCSG)	177.80		13 3/8 (CSG,LCSG)	339.73
7 5/8 (CSG,LCSG)	193.68		16 (CSG,LCSG)	406.40
The pitch of API gauges:3.175(8); The form angle of API thread gauge:60°

API gauge (Buttress Casing Thread)

Gauge CodeOuter dia. ØTaperGauge CodeOuter dia. ØTaper

4 1/2 BCSG	114.30	1:16	8 5/8 BCSG	219.08	1:16
5 BCSG	127.00		9 5/8 BCSG	244.48
5 1/2 BCSG	139.70		10 3/4 BCSG	273.05
6 5/8 BCSG	168.28		11 3/4 BCSG	298.45
7 BCSG	177.80		13 3/8 BCSG	339.73
7 5/8 BCSG	193.68		16 BCSG	406.40	1:12
The pitch of API gauges:5.08(5); The form angle of API thread gauge:3°, 10°.

API gauge (Non-upset Tubing Thread)

Gauge CodeOuter dia. ØPitchTaperGauge CodeOuter dia. ØPitchTaper

1.050 TBG	26.67	2.54(10)	1:16	2 7/8 TBG	73.03	2.54(10)	1:16
1.315 TBG	33.40	2.54(10)		3 1/2 TBG	88.90	2.54(10)
1.660 TBG	42.16	2.54(10)		4 TBG	101.60	3.175(8)
1.900 TBG	48.26	2.54(10)		4 1/2 TBG	114.30	3.175(8)
2 3/8 TBG	60.33	2.54(10)
The form angle of API gauges:60°

API gauge (External-upset Tubing Thread)

Gauge CodeOuter dia. ØPitchTaperGauge CodeOuter dia. ØPitchTaper

1.050 UPTBG	26.67	2.54(10)	1:16	2 7/8 UPTBG	73.03	3.175(8)	1:16
1.315 UPTBG	33.40	2.54(10)		3 1/2 UPTBG	88.90	3.175(8)
1.660 UPTBG	42.16	2.54(10)		4 UPTBG	101.60	3.175(8)
1.900 UPTBG	48.26	2.54(10)		4 1/2 UPTBG	114.30	3.175(8)
2 3/8 UPTBG	60.33	3.175(8)
The form angle of API gauges:60°

API gauge (Line Pipe Thread)

Gauge CodeOuter dia. ØPitchTaperGauge CodeOuter dia. ØPitchTaper

1/8 LP	3.18	0.941(27)	1:16	2 1/2 LP	63.50	3.175(8)	1:16
1/4 LP	6.35	1.411(18)		3 LP	76.20	3.175(8)
3/8 LP	9.53	1.411(18)		3 1/2 LP	88.90	3.175(8)
1/2 LP	12.70	1.814(14)		4 LP	101.60	3.175(8)
3/4 LP	19.05	1.814(14)		5 LP	127.00	3.175(8)
1 LP	25.40	2.209(11 1/2)		6 LP	152.40	3.175(8)
1 1/4 LP	31.75	2.209(11 1/2)		8 LP	203.20	3.175(8)
1 1/2 LP	38.10	2.209(11 1/2)		10 LP	254.00	3.175(8)
2	50.80	2.209(11 1/2)
The form angle of API gauges:60°