Standard Pack = 1 piece(s). Tap Size = 5/16 inch ; TPI / Pitch = 18 ; Tap Style = Spiral Point ; Thread Type = UNC ; Thread Limit = H3 ; Chamfer = 4P - 4.5P ; Flutes = 2 ; Material = HSS ; Coating = BRIGHT ; Overall Length = 4 inch ; Thread Length = 1-1/8 inch ; Shank Diameter = 0.318 inch ; Square Size = 0.238 inch ; Coolant Thru = No ; Length = 4.95 ; Width = 0.7 ; Height = 0.65 ;