Specifications:Thread Size: 5/16"-18 BSWTolerance: H2Thread Length: 16mm / 0.63"Square End Size: 5mm / 0.2"Round Shank Dia.: 6mm / 0.24"Total Length: 70mm / 2.76"Round Shank Length: 33mm / 1.3"Material: M35 Cobalt High Speed Steel (5% Co)Finish: UncoatedCutting Direction: Right HandTechnology: Fully-GroundPackage: 1pcs x Spiral Flute TapDescriptions:1. Spiral flute design, upward chip removal. Right hand thread cutting, clear threads with no burrs, fast tapping with accuracy.2. M35 cobalt high-speed steel tool (5% Co) is with high hardness (up to around 67HRC) and toughness for wear resistance. Features just the base substrate without any additional coatings, great for wide ranges of applications.3. Suitable for processing holes and sticky materials. Great for drilling and tapping aluminum, die steel, stainless steel, bronze, hard plastics, etc..4. Used on drilling machines, tapping machines, CNC and milling machines. Use with tapping oil to get higher quality threads and more durable taps.5. Machine taps are suggested to be used with tap collets with overload protection. Hand use is easy to cause damage to the tap due to uneven force.