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):
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BCSG
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CSG
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NC
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IF
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TBG(NU)
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UP TBG
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REG
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FH
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4 1/2 BCSG
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4 1/2 CSG
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NC23
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2 3/8 IF
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2 3/8 TBG (NU)
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2 3/8 UP TBG(EUE)
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2 3/8 REG
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2 7/8 FH
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5 BCSG
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5 CSG
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NC26
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2 3/7 IF
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2 7/8 TBG (NU)
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2 7/8 UP TBG(EUE)
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2 7/8 REG
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3 1/2 FH
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5 1/2 BCSG
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5 1/2 CSG
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NC31
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3 1/2 IF
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3 1/2 TBG (NU)
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3 1/2 UP TBG(EUE)
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3 1/2 REG
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4"FH
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6 5/8 BCSG
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6 5/8 CSG
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NC35
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4 "IF
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4 TBG (NU)
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4 UP TBG(EUE)
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4 1/2 REG
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4 1/2 FH
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7 BCSG
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7 CSG
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NC38
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4 1/2 IF
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4 1/2 TBG (NU)
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4 1/2 UP TBG(EUE)
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5 1/2 REG
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5 1/2 FH
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7 5/8 BCSG
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7 5/8 CSG
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NC40
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5 1/2 IF
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6 5/8 REG
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6 5/8 FH
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8 5/8 BCSG
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8 5/8 CSG
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NC44
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7 5/8 REG
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9 5/8 BCSG
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9 5/8 CSG
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NC46
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8 5/8 REG
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10 3/4 BCSG
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10 3/4 CSG
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NC50
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11 3/4 BCSG
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11 3/4 CSG
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NC56
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13 3/8 BCSG
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13 3/8 CSG
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NC61
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16 BCSG
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16 CSG
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NC70
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18 5/8 BCSG
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18 5/8 CSG
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NC77
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20 BCSG
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20 CSG
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UP TBG, EU LINE PIPE or LP ; DP UP DP Gauge
API gauge (Casing Round Thread)
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Gauge Code
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Outer dia. Ø
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Taper
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Gauge Code
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Outer dia. Ø
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Taper
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4 1/2 (CSG,LCSG)
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114.30
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1:16
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8 5/8 (CSG,LCSG)
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219.08
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1:16
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5 (CSG,LCSG)
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127.00
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9 5/8 (CSG,LCSG)
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244.48
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5 1/2 (CSG,LCSG)
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139.70
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10 3/4 (CSG,LCSG)
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273.05
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6 5/8 (CSG,LCSG)
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168.28
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11 3/4 (CSG,LCSG)
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298.45
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7 (CSG,LCSG)
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177.80
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13 3/8 (CSG,LCSG)
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339.73
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7 5/8 (CSG,LCSG)
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193.68
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16 (CSG,LCSG)
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406.40
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The pitch of API gauges:3.175(8); The form angle of API thread gauge:60°
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API gauge (Buttress Casing Thread)
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Gauge Code
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Outer dia. Ø
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Taper
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Gauge Code
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Outer dia. Ø
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Taper
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4 1/2 BCSG
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114.30
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1:16
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8 5/8 BCSG
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219.08
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1:16
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5 BCSG
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127.00
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9 5/8 BCSG
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244.48
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5 1/2 BCSG
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139.70
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10 3/4 BCSG
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273.05
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6 5/8 BCSG
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168.28
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11 3/4 BCSG
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298.45
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7 BCSG
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177.80
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13 3/8 BCSG
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339.73
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7 5/8 BCSG
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193.68
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16 BCSG
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406.40
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1:12
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The pitch of API gauges:5.08(5); The form angle of API thread gauge:3°, 10°.
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API gauge (Non-upset Tubing Thread)
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Gauge Code
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Outer dia. Ø
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Pitch
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Taper
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Gauge Code
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Outer dia. Ø
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Pitch
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Taper
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1.050 TBG
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26.67
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2.54(10)
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1:16
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2 7/8 TBG
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73.03
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2.54(10)
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1:16
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1.315 TBG
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33.40
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2.54(10)
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3 1/2 TBG
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88.90
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2.54(10)
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1.660 TBG
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42.16
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2.54(10)
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4 TBG
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101.60
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3.175(8)
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1.900 TBG
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48.26
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2.54(10)
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4 1/2 TBG
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114.30
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3.175(8)
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2 3/8 TBG
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60.33
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2.54(10)
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The form angle of API gauges:60°
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API gauge (External-upset Tubing Thread)
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Gauge Code
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Outer dia. Ø
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Pitch
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Taper
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Gauge Code
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Outer dia. Ø
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Pitch
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Taper
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1.050 UPTBG
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26.67
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2.54(10)
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1:16
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2 7/8 UPTBG
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73.03
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3.175(8)
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1:16
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1.315 UPTBG
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33.40
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2.54(10)
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3 1/2 UPTBG
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88.90
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3.175(8)
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1.660 UPTBG
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42.16
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2.54(10)
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4 UPTBG
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101.60
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3.175(8)
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1.900 UPTBG
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48.26
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2.54(10)
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4 1/2 UPTBG
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114.30
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3.175(8)
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2 3/8 UPTBG
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60.33
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3.175(8)
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The form angle of API gauges:60°
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API gauge (Line Pipe Thread)
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Gauge Code
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Outer dia. Ø
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Pitch
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Taper
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Gauge Code
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Outer dia. Ø
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Pitch
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Taper
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1/8 LP
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3.18
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0.941(27)
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1:16
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2 1/2 LP
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63.50
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3.175(8)
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1:16
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1/4 LP
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6.35
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1.411(18)
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3 LP
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76.20
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3.175(8)
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3/8 LP
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9.53
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1.411(18)
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3 1/2 LP
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88.90
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3.175(8)
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1/2 LP
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12.70
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1.814(14)
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4 LP
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101.60
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3.175(8)
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3/4 LP
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19.05
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1.814(14)
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5 LP
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127.00
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3.175(8)
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1 LP
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25.40
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2.209(11 1/2)
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6 LP
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152.40
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3.175(8)
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1 1/4 LP
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31.75
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2.209(11 1/2)
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8 LP
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203.20
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3.175(8)
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1 1/2 LP
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38.10
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2.209(11 1/2)
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10 LP
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254.00
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3.175(8)
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2
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50.80
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2.209(11 1/2)
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The form angle of API gauges:60°
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