Standard Pack = 1 piece(s). Tap Size = M18 ; TPI / Pitch = 2.5 ; Tap Style = Spiral Point ; Thread Limit = D5 ; Chamfer = 3.5P - 4P ; Flutes = 4 ; Material = VC-10 ; Coating = STEAM OXIDE ; Overall Length = 4-1/4 inch ; Thread Length = 2 inch ; Shank Diameter = 0.590 inch ; Square Size = 0.442 inch ; Coolant Thru = No ; Class of Fit = 6H ; Tap Drill Size (Min) = 18.54mm ; Tap Drill Size (Max) = 18.90mm ; STI Thread = Yes ; Length = 4.7 ; Width = 1.1 ; Height = 0.95 ;