which 3/8 tap for full flow?

[ridenrace6]

can someone steer me in the right direction as to which one of these taps i need to tap the "normal" full flow location, i believe it's 3/8 but they have several different types listed

https://www.fastenal.com/products/cutting-tools-metalworking/threading-and-tapping/taps/pipe-taps?r=~|categoryl1:%22601071%20Cutting%20Tools%209and%20Metalworking%22|~%20~|categoryl2:%22601102%20Threading%20and%20Tapping%22|~%20~|categoryl3:%22612644%20Taps%22|~%20~|categoryl4:%22601106%20Pipe%20Taps%22|~%20~|sattr01:^3/8%22$|~


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[Dougy Dee]

3/8 NPT

[ridenrace6]

3/8 NPT

yea i know it's 3/8 pipe thread but i didn't know there were that many different types of pipe taps, fastenal has 14 choices for a 3/8 pipe tap.

fastenal list tapered, straight, dry sealing, and tapered plug as options in the drop down menus??


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[Erlend / bug66]

NPT is a tapered size.

3/8-18 NPT would be the right tap I believe