Collis Pull Stud Retension Knob, 45 Deg Angle, For Use With: For Fadal or Mazak CNC Mill, Pilot: 0.636", Knob: 0.74", 0.44" Installation Length, 0.49" Neck Diameter, 0.64" Shoulder to End Length, 1.625" Overall Length, 5/8-11 Thread, Material: Alloy Steel
- Made from alloy steel 5155 with heat treat to RC 56-58
- Each retention knob is individually magnetic particle tested to ensure free of crack
- High quality black oxide finish to ensure long enduring tool life
- Fully ground on all critical surface including a pilot under the flange of retention knob for full contact between tool holder's taper end and retention knob