Spiral Flute Tap Right Hand Tap Style Plug Size 1/4 In. Pitch 20 Material Powdered Metal Cobalt Steam Oxide Finish Overall Length 2-1/2 In. Thread Length 5/8 In. Shank Dia 0.255 In. Number of Flutes 3 Thread Type UNC Pitch Diameter Limits H5 List Number T101 Standards USCTI 302A