#1-64 TPI, 1-13/16" L, UNC, Plug Style, Straight Flute, H1 Thread Limit, STI, Class 3B, Tap Tap Type STI, Class 3B Style Plug Tap Size #1 TPI 64 Thread Type UNC Thread Length 1/2 Inch Flute Type Straight Number of Flutes 3 Overall Length 1-13/16 Inch...