Home   ›   Shop   ›   JM31118A
Category: Retention Knobs
Thread Size: 1.00-8
Angle: 60
Knob Diameter: 0.903
L1 Length: 1.3840
L2 Length: 1.778
Flange Thickness: 0.392
Hole Diameter: -
Neck Diameter: 0.668
Pilot Diameter: 1.026
Shoulder Diameter: 1.438
Wrench Flat Diameter: 1.245
Socket Part #: RKW50
Number: JM31118A
Coolant Version: JM31844A, JM31844AHT, JM31844AHTHS, JM32749, JM32749HT, JM32749HTHS, JM36145, JM36145HT, JM31118AH.236
Alternate Part: JM31118AHT, JM31118AHTHS
Country of Origin: USA

This knob is a replacement for the following parts:

ManufacturerPart Number
Retention Knob Supply: RK311-18A
Seco: 1681
Kenn 2: 2878421
Command: RB6E-0002
Davies: PS-536X60
Kennametal: RK311-18A
Lyndex: C50-6000
MSC: 1401892
Parlec: 5014TRK
For Machines (see disclaimer)*: Enshu, Mitsubishi, Niigata, Okuma, Snk

* 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