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NPT/BSPT (National Pipe Taper/British Standard Pipe Taper) - 11212

Taper Tap 4 per side
Second Tap 8 per side
Bottoming Tap 23 per side
* Also Available in HSS

Size Inches NPT TPI BSPT TPI
1/8 27 28
1/4 18 19
3/8 18 19
1/2 14 14
5/8 14 14
3/4 14 14
7/8 14 14
1 11.1/2 11
1.1/4 11.1/2 11
1.1/2 11.1/2 11
2 11.1/2 11