Straight Pipes - Threads and Tap Drill

Threads and tap drills for American standard straight pipes

American standard straight pipes - threads and tap drills:

Pipe Size
(inches)
Threads per InchPipe Diameter
(inches)
Tap Drill
1/8 27 0.405 S
1/4 18 0.540 29/64
3/8 18 0.675 19/32
1/2 14 0.840 47/64
3/4 14 1.050 15/16
1 11.5 1.315 1 3/16
1 1/4 11.5 1.660 1 33/64
1 1/2 11.5 1.900 1 3/4
2 11.5 2.375 2 7/32
2 1/2 8 2.875 2 21/32
3 8 3.500 3 9/32
3 1/2 8 4.000 3 25/32
4 8 4.500 4 9/32
4 1/2 8 5.000 4 25/32
5 8 5.563 5 11/32
6 8 6.625 6 13/32
  • 1 inch = 25.4 mm

Related Topics

  • Dimensions - Sizes and dimensions of pipes and tubes, and their fittings - inside and outside diameter, weight and more

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