Drillco® Nitro®-Max Spiral Point Tap, High Speed Cobalt, 5/16"-24 Thread, 2-23/32" LManufactured to DIN ANSI specifications, with DIN lengths to allow for longer reach and deeper threading in a single pass TiCN (Titanium Carbo Nitride) coating helps to reduce galling, microwelding, seizing and adhesive wear Manufactured from M35 Cobalt (HSS E) with a high vanadium content, these taps offer higher heat resistance and red hardness over conventional high speed steel taps Material: High Speed Cobalt Thread Size: 5 16" 24 No. of Flutes: 3