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J.P.G.
 
Pipe Thread Gauge
 
GPIP - G
 
 
Thread Gauge Specifications
 
Nominal size Thread per inch   External Internal
Major diameter Max. Min Pitch diameter Max. Min Minor diameter Max. Min Minor diameter Max. Min Pitch diameter Max. Min Minor diameter Max. Min
Class A Class B
G 1/16 28 0.91 7.723 0 -241 7.142 0 -107 -214 6.651 0 no rules 7.723 0 no rules 7.142 0 107 6.651 0 282
G 1/8 28 0.91 9.728 0 -241 9.147 0 -107 -214 8.566 0 9.728 0 9.147 0 107 8.566 0 282
G 1/4 19 1.34 13.157 0 -250 12.301 0 -125 -250 11.445 0 13.157 0 12.301 0 125 11.445 0 445
G 3/8 19 1.34 16.662 0 -250 15.806 0 -125 -250 14.95 0 16.662 0 15.806 0 125 14.95 0 445
G 1/2 14 1.81 20.955 0 -284 19.793 0 -142 -284 18.631 0 20.955 0 19.793 0 142 18.631 0 541
G 5/8 14 1.81 22.911 0 -284 21.749 0 -142 -284 20.587 0 22.911 0 21.749 0 142 20.587 0 541
G 3/4 14 1.81 26.441 0 -284 25.279 0 -142 -284 24.117 0 26.441 0 25.279 0 142 24.117 0 541
G 7/8 14 1.81 30.201 0 -284 29.039 0 -142 -284 27.877 0 30.201 0 29.039 0 142 27.877 0 541
G 1 11 2.31 33.249 0 -360 31.77 0 -180 -360 30.291 0 33.249 0 31.77 0 180 30.291 0 640
G 1 1/8 11 2.31 37.897 0 -360 36.418 0 -180 -360 34.939 0 37.897 0 36.418 0 180 34.939 0 640
G 1 1/4 11 2.31 41.91 0 -360 40.431 0 -180 -360 38.952 0 41.91 0 40.431 0 180 38.952 0 640
G 1 1/2 11 2.31 47.803 0 -360 46.324 0 -180 -360 44.845 0 47.803 0 46.324 0 180 44.845 0 640
G 1 3/4 11 2.31 53.746 0 -360 52.267 0 -180 -360 50.788 0 53.746 0 52.267 0 180 50.788 0 640
G 2 11 2.31 59.614 0 -360 58.135 0 -180 -360 56.656 0 59.614 0 58.135 0 180 56.656 0 640
G 2 1/4 11 2.31 65.71 0 -434 64.231 0 -217 -434 62.752 0 65.71 0 64.231 0 217 62.752 0 640
G 2 1/2 11 2.31 75.184 0 -434 73.705 0 -217 -434 72.226 0 75.184 0 73.705 0 217 72.226 0 640
G 2 3/4 11 2.31 81.534 0 -434 80.055 0 -217 -434 78.576 0 81.534 0 80.055 0 217 78.576 0 640
G 3 11 2.31 87.884 0 -434 86.405 0 -217 -434 84.926 0 87.884 0 86.405 0 217 84.926 0 640
G 3 1/2 11 2.31 100.33 0 -434 98.851 0 -217 -434 97.372 0 100.33 0 98.851 0 217 97.372 0 640
G 4 11 2.31 113.03 0 -434 111.551 0 -217 -434 110.072 0 113.03 0 111.551 0 217 110.072 0 640
G 4 1/5 11 2.31 125.73 0 -434 124.251 0 -217 -434 122.772 0 125.73 0 124.251 0 217 122.772 0 640
G 5 11 2.31 138.43 0 -434 136.951 0 -217 -434 135.472 0 138.43 0 136.951 0 217 135.472 0 640
G 5 1/2 11 2.31 151.13 0 -434 149.651 0 -217 -434 148.172 0 151.13 0 149.651 0 217 148.172 0 640
G 6 11 2.31 163.83 0 -434 162.351 0 -217 -434 160.872 0 163.83 0 162.351 0 217 160.872 0 640
   

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