The TiCN coating on these taps protects them from wear and is harder and more wear-resistant than a TiN coating. Coolant-through taps have holes that allow coolant to flow to their tip to reduce heat and friction during threading tasks. These taps meet DIN length standards and have a longer overall length than taps that meet ISO, ANSI, and JIS length standards. They also meet ANSI shank standards, which means they measure their shank diameter in inches and fit in standard tools used in the U.S. This listing is for each. Technical Specification Item Thread Forming Tap Thread Size 5/8-18 Thread Standard UNF Tap Material Cobalt Tap Finish TiCN Thread Length 7/8 in Overall Length 3 15/16 in 75% Thread Drill Size 15.15 mm Thread Limit H10 Class of Fit 2B Thread Direction Right Hand Tap Length Standard DIN Tap Shank Standard ANSI Primary Material Application All Materials 55% Thread Drill Size 15.30 mm 65% Thread Drill Size 15.25 mm Coolant Fed Coolant Through Extended Neck No Features 40-50% Less Machining Torque, Additional Length Provides Greater Reach Capabilities, Fluteless Forming Tap Material Grade - Machining 16050 Number of Flutes 0 Primary Material Application ISO Code H, K, M, N, P Secondary Material Application Hardened Steel, Nickel, Titanium Secondary Material Application ISO Code H, S Series 16050 Shank Dia. 15/32 in Shank Length 1 13/16 in Spiral Direction Neutral Square Size 0.3600 in Standards DIN Tap Chamfer Modified Bottom, Semi-Bottom Tap Grouping Individual Tap Style Thread Forming Thread Limit / Class of Fit H10 / 2B Threads per Inch 18