Tap Question?

[rg_1111@yahoo.com]

What size Tap for AR pistol grip?

[freakshow10mm]

1/4-28

[Shane916]

I thought it was something like 1/4 x 28 TPI?

[ke6guj]

yah, 1/4-28

[freakshow10mm]

Double checked the blueprints. 1/4-28 UNF thread.

[rg_1111@yahoo.com]

Thanks guys I have lost my glasses and it's hard to read the small print. Even lost or misplaced magnifying glass. It's hell getting old. Now where did i put the Tap &Die set.