Pipe Tap Size (in)	NPT & NPTF
Pipe Tap Size (in)	Pitch (TPI)	Drill Size (in)
1/16	27	.242(C)
1/8	27	.333 (Q)
1/4	18	7/16
3/8	18	9/16
1/2	14	45/64
3/4	14	29/32
1	11.5	1-9/64
1-1/4	11.5	1-31/64
1-1/2	11.5	1-23/32
2	11.5	2-7/32

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