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High Torque© (HT) retention knob, CAT50, 1"-8, 90°, Coolant through, O-Rings included; Replaces JM32450

Retention Knob Information and Installation (PDF)

Retention Knob Installation Video

Category: Retention Knobs
Thread Size: 1.00-8
Angle: 90
Knob Diameter: 0.944
L1 Length: 0.9035
L2 Length: 1.219
Flange Thickness: 0.195
Hole Diameter: 0.236
Knob Side O-Ring: P-9
Neck Diameter: 0.707
Pilot Diameter: 1.031
Shoulder Diameter: 1.415
Wrench Flat Diameter: 1.177
Socket Part #: RKW50M
Number: JM32450HT
Alternate Part: JM32450HTHS
Country of Origin: USA

This knob is a replacement for the following parts:

ManufacturerPart Number
For Machines (see disclaimer)*: Mitsui-Seiki

* 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