NPSF Straight Pipe Thread Plug Gage Pitch Diameters

Size
GO Plug Gage Class 2B
NO GO Plug Gage Class 2B
1/8-27
.3692"
.3727"
1/4-18
.4852"
.4904"
3/8-18
.6205"
.6257"
1/2-14
.7700"
.7767"
3/4-14
.9805"
.9972"
1-11 1/2
1.2284"
1.2365"

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