Standard Pack = 1 piece(s). Tap Size = 1/4 inch ; TPI / Pitch = 28 ; Tap Style = Spiral Point ; Thread Type = UNF ; Thread Limit = H7 ; Chamfer = 4P - 4.5P ; Flutes = 3 ; Material = HSSE ; Coating = Steam Oxide ; Overall Length = 2-1/2 inch ; Thread Length = 1 inch ; Shank Diameter = 0.255 inch ; Square Size = 0.191 inch ; Coolant Thru = No ; Length = 2.95 ; Width = 0.4 ; Height = 0.3 ;