Tap Material / High-Speed Steel Tap Finish / Uncoated Thread Length / 1 inch Overall Length / 2-1/2 inch Tap Chamfer / Bottoming, Plug, Taper Thread Direction / Right Hand Number of Flutes / 4 Includes / One Each Taper, Plug, and Bottoming Number of Pieces / 3 Shank Diameter / 0.255 inch Standards / Unified and American National Threads Tap Style / Straight Flute (Hand) Tap Thread Size / 1/4 inch-28