●This product is ordered by the lot. Purchase unit: 10 pieces; BMA: A all-purpose material that is made of ultra-fine carbide with TiAlN coating for hard work materials at medium and high speed; Excellent effect on carbon steel; Tip for threading processing; Outer diameter TR (trapezoid 30° screw); Right screw; Pitch: 0.16 inches (4.0 mm); Thread angle: 30°; Tip size: 0 mm; Tip size: 0 mm; Tip size: 0 mm; Tip size: 0 mm Injacent Circular Dimensions (in inches) ): 1/2; Surface Treatment: BMA (TiAlN Coat); Thread Type: TRAPEZ/Trapezoid Screw; Inner Circulation; Tip Size: L 0.6 inches (16 mm); I.C.3/8; Ultra-fine carbide