Machine Tap Right Hand Tap Style Semi-Bottoming Size 1/4 In. Pitch 20 Material High Speed Steel-E NE2 Finish Overall Length 3-5/32 In. Thread Length 2-1/2 In. Shank Dia 0.255 In. Number of Flutes 3 Thread Type UNC Pitch Diameter Limits 2B 3B Standards ANSI DIN