HSS Steel Screw Tap M2-M20 Titanium Coated Spiral Metric Machine Thread Tap Material: High Speed Steel Used to make new threads or re-thread damaged or jammed threads Straight Flute Threads for Blind Hole, Suitable for taping Blind hole,Smooth Chip Discharge with High Quality Cutting; Spiral FLute Threads for Through Hole, well Chip Removal, Easy Tapping, Excellent Cutting Performance. Machining Steel Cast Iron, Aluminum Alloy and other non-heat treater Metal,Hardness less than HRC30.
