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High Torque© High Strength (HTHS) retention knob, BT30, M12X1.75; radius, Solid; Made from 9310H steel, 40% stronger

Retention Knob Information and Installation (PDF)

Retention Knob Installation Video

Category: Retention Knobs
Thread Size: M12X1.75
Angle: R.118
Knob Diameter: -
L1 Length: 0.7638
L2 Length: 0.946
Flange Thickness: 0.135
Hole Diameter: -
Neck Diameter: 0.313
Pilot Diameter: 0.511
Shoulder Diameter: 0.665
Wrench Flat Diameter: 0.548
Socket Part #: RKW30D
Number: JM71101HTHS
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