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High Torque© High Strength (HTHS) retention knob, BT 50, M24x3; 60°, Coolant through, O-Rings included; Made from 9310H steel, 40% stronger; replaces JM35052

Retention Knob Information and Installation (PDF)

Retention Knob Installation Video

Category: Retention Knobs
Thread Size: M24X3.0
Angle: 60
Knob Diameter: 0.903
L1 Length: 1.3840
L2 Length: 1.778
Flange Thickness: 0.392
Hole Diameter: 0.236
Neck Diameter: 0.668
Pilot Diameter: 0.983
Shoulder Diameter: 1.440
Wrench Flat Diameter: 1.246
Socket Part #: RKW50
Number: JM35052HTHS
Solid Version: JM35048A
Alternate Part: JM35052HTHS.261
Thread Side O-Ring: P21
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