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High Torque© High Strength (HTHS) retention knob,CAT 45, 3/4"-10; 15°, Coolant through; Made from 9310H steel, 40% stronger

Retention Knob Information and Installation (PDF)

Retention Knob Installation Video

Category: Retention Knobs
Thread Size: .750-10
Angle: 15
Knob Diameter: 0.904
L1 Length: 2.6610
L2 Length: 1.181
Flange Thickness: 0.197
Hole Diameter: 3.125
Neck Diameter: 0.667
Pilot Diameter: 0.761
Shoulder Diameter: 1.178
Wrench Flat Diameter: 0.945
Socket Part #: RKW45M
Number: JM71134HTHS
Solid Version: JM71136
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