Serving the Industrial, Marine and Construction Trades Since 1952

Pipe Tap Drill Sizes

Pipe

TPI

Drill
1/8 27 R
1/4 18 7/16
3/8 18 37/64
1/2 14 29/32
3/4 14 59/64
1 11.5 1 5/32
1 1/4 11.5 1 1/2
1 1/2 11.5 1 47/64
2 11.5 2 7/32