Ret Knob, MAS-BT, 5/8-11, 45 Deg, w/Hole, Parlec, Mfr#: 4009TRKC

Retention Knob, Taper Size CAT40, Thread Size 5/8 In.-11, Angle Radius 45 Degrees , Knob Outside Dia. 0.5880 in, Coolant Fed Coolant Through, Features Case Hardened to Ensure Long Service Life, Material – Machining High Speed Steel