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Standard retention knob, BT30, M12x1.75; 90°, Solid

Retention Knob Information and Installation (PDF)

Retention Knob Installation Video

Category: Retention Knobs
Thread Size: M12X1.75
Angle: 90
Knob Diameter: 0.549
L1 Length: 0.7067
L2 Length: 0.904
Flange Thickness: 0.195
Hole Diameter: -
Neck Diameter: 0.313
Pilot Diameter: 0.492
Shoulder Diameter: 0.784
Wrench Flat Diameter: 0.667
Socket Part #: N/A
Number: JM32613
Country of Origin: USA

This knob is a replacement for the following parts:

ManufacturerPart Number
Retention Knob Supply: RK326-13
Seco: 1611
Command: RB3M-0101
Lyndex: B35-9000
MSC: 78175213
Parlec: 3502TRK
For Machines (see disclaimer)*: Kitamura

* 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