Standard Pack = 1 piece(s). Tap Size = 1/4 inch ; TPI / Pitch = 28 ; Tap Style = Straight Flute ; Thread Type = UNF ; Thread Limit = +0.005 inch ; Chamfer = 4P - 4.5P ; Flutes = 4 ; Material = HSS ; Coating = TiCN ; Overall Length = 2-1/2 inch ; Thread Length = 1 inch ; Shank Diameter = 0.255 inch ; Square Size = 0.191 inch ; Coolant Thru = No ; Length = 3.6 ; Width = 0.4 ; Height = 0.35 ;