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Pipe Size, Flange & Thread Data

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Nom. Pipe Size Thrds per inch PIPE O.D. Pipe I.D. (ANSI Schedule) Nom. Pipe Size Tap Drill Sizes Thread Length Nom. Pipe Size
N/A THREADED 40 80 120 custom 160 XX NPT National Pipe Thread for Pressure Sealing SPT Straight Pipe Thread for Mechanical Connection Total Inches ext. Thread Makeup after tightening
5 10
1/8 27 .405 n/a .307 .269 .215 1/8 21/64 .328 11/32 .344 .392 .291 1/8
1/4 18 .540 n/a .410 .364 .302 1/4 27/64 .422 7/16 .438 .595 .367 1/4
3/8 18 .675 n/a .545 .493 .423 3/8 9/16 .563 37/64 .578 .601 .407 3/8
1/2 14 .840 .710 .674 .622 .546 .480 .466 .252 1/2 11/16 .688 23/32 .719 .782 .534 1/2
3/4 14 1.050 .920 .884 .824 .742 .690 .614 .434 3/4 57/64 .891 59/64 .922 .794 .553 3/4
1 11.5 1.315 1.185 1.097 1.049 .957 .891 .815 .599 1 1 1/8 1.125 1 5/32 1.156 .985 .661 1
1 1/4 11.5 1.660 1.530 1.442 1.380 1.278 1.204 1.160 .896 1 1/4 1-15/32 1.469 1 1/2 1.500 1.009 .681 1 1/4
1 1/2 11.5 1.900 1.777 1.682 1.610 1.500 1.423 1.338 1.100 1 1/2 1 23/32 1.719 1 3/4 1.750 1.025 .681 1 1/2
2 11.5 2.375 2.245 2.157 2.067 1.939 1.845 1.689 1.503 2 2 3/16 2.188 2 7/32 2.219 1.058 .697 2
2 1/2 8 2.875 2.709 2.635 2.469 2.323 2.239 2.125 1.771 2 1/2 2 19/32 2.594 2 21/32 2.656 1.571 .932 2 1/2
3 8 3.500 3.334 3.260 3.068 2.900 2.758 2.624 2.300 3 3 1/4 3.250 3 5/16 3.31 1.634 1.016 3
3 1/2 8 4.000 3.834 3.760 3.548 3.364 2.728 3 1/2 3 3/4 3.750 3 13/16 3.81 1.684 1.071 3 1/2
4 8 4.500 4.334 4.260 4.026 3.826 3.624 3.438 3.152 4 4 1/4 4.250 4 5/16 4.31 1.734 1.094 4
5 8 5.563 5.345 5.295 5.047 4.813 4.563 4.313 4.603 5 5 5/16 5.315 5 3/8 5.375 1.840 1.187 5
6 8 6.625 6.407 6.357 6.065 5.761 5.501 5.189 4.897 6 6 3/8 6.375 6 7/16 6.437 1.946 1.208 6
8 8 8.625 8.407 8.329 7.981 7.625 7.189 6.813 6.875 8 2.146 1.313 8
150 # Flange ( 0.062″ face thickness)
Nominal Pipe Size O.D. Thick * O.D. of Raised Face Diam. of Bolt Circle Weight Blind LBS
14.25.562.003.122
1 1/44.62.622.503.503
1 1/25.00.692.873.873
26.00.753.624.754
2 1/27.00.874.125.507
37.50.945.006.009
3 1/28.5.945.507.0013
49.00.946.197.5017
510.00.947.318.5020
611.001.008.509.5027
813.501.1310.6211.7547
300 # Flange ( 0.062″ face thickness)
Nominal Pipe Size O.D. Thick * O.D. of Raised Face Diam. of Bolt Circle Weight Blind LBS
14.870.692.003.504
1 1/45.250.752.503.876
1 1/26.120.812.874.507
26.500.873.625.008
2 1/27.501.004.125.8712
38.251.125.006.6216
3 1/29.001.195.507.2521
410.001.256.197.8728
511.001.387.319.2537
612.501.448.5010.6248
815.001.6210.6313.0079
600 # Flange ( 0.25″ face thickness)
Nominal Pipe Size O.D. Thick * O.D. of Raised Face Diam. of Bolt Circle Weight Blind LBS
1 4.87 .94 2.00 3.50 4
1 1/4 5.25 1.06 2.50 3.87 6
1 1/2 6.12 1.12 2.87 4.50 8
2 6.50 1.25 3.62 5.00 10

2 1/2

7.50 1.38 4.13 5.87 15
3 8.25 1.50 5.00 6.62 20
31/2 9.00 1.63 5.50 7.25 29
4 10.75 1.75 6.19 8.50 41
5 13.00 2.00 7.31 10.50 68
6 14.00 2.12 8.50 11.50 86
8 16.50 2.44 10.63 13.75 139
Delta Controls Corporation

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