Hand Tap Right Hand Tap Style Taper Size 1/4 In. Pitch 28 Material High Speed Steel Uncoated Finish Overall Length 2-1/2 In. Thread Length 1 In. Shank Dia 0.255 In. Number of Flutes 4 Thread Type UNF Pitch Diameter Limits H3 List Number 5303 Standards ANSI Unified and American National Threads