3.35 X .91" 60 DEGREE BT50 COOLANT THRU RETENTION KNOB (3900-5398)

3.35 X .91" 60 Degree BT40 Coolant Thru Retention Knob Heat treated alloy steel. All dimensions are in accordance to MAS specifications for BT holders. D is 1.50". D1 is .91". D2 is .67". D3 is .24". D4 is .98". L is 3.35". L1 is 1.38". L2 is .39". The thread is M24 X 3.0. Shipping Weight: 0.6 lbs