Machine Tap Tap Style Straight Flute (Hand) Tap Dimension Type Inch Tap Thread Size 1/2 In.-20 Tap Chamfer Plug Number of Flutes 3 Pitch Diameter Limit H3 Tap Material High Speed Steel Tap Finish TiN Tap Thread Type UNF Right Hand Thread Length 1-21/32 In. Shank Dia 0.367 In. Overall Length 3-3/8 In. Number of Pieces 1California proposition 65 warning