Home   ›   Shop   ›   JM11644

Standard retention knob; CAT40, 5/8"-11; 45°, Solid; No pilot

Retention Knob Information and Installation (PDF)

Retention Knob Installation Video

Category: Retention Knobs
Thread Size: 1.00-8
Angle: 45
Knob Diameter: 0.845
L1 Length: 0.8750
L2 Length: 1.250
Flange Thickness: 0.250
Hole Diameter: -
Neck Diameter: 0.645
Pilot Diameter: -
Shoulder Diameter: 1.380
Wrench Flat Diameter: 1.12
Socket Part #: N/A
Number: JM11644
Country of Origin: USA

This knob is a replacement for the following parts:

ManufacturerPart Number

* Retention knobs are not interchangeable. Machines are only given as a reference, JMPP makes no guarantee this is the correct knob for your machine. Please call us at 1-800-322-7750 or email for knob identification help.

WARNING: The steel alloy used in this product contains chromium and nickel. This product can expose you to chemicals including chromium and nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to