Home   ›   Shop   ›   JM31117A

OBSOLETE-Standard retention knob, BT50, M24X3, 60°, Solid

Category: Retention Knobs
Thread Size: M24X3.0
Angle: 60
Knob Diameter: 0.903
L1 Length: 1.3760
L2 Length: 1.770
Flange Thickness: 0.392
Hole Diameter: -
Neck Diameter: 0.668
Pilot Diameter: 0.984
Shoulder Diameter: 1.492
Wrench Flat Diameter: 1.175
Socket Part #: RKW50M
Number: JM31117A
Coolant Version: JM31843HT
Alternate Part: JM31117AHT, JM31117AHTHS
Country of Origin: USA

This knob is a replacement for the following parts:

ManufacturerPart Number
Retention Knob Supply: RK311-17A
Sandvik: 393.2935-50 040
Seco: 1671
Techniks: 17810
Kenn 2: 2878528
Command: RB6M-0002
Davies: PS-446X60
Kennametal: RK50BT2M
Lyndex: B50-6000
MSC: 84930031
Parlec: 5004TRK
For Machines (see disclaimer)*: Matsuura, Mitsubishi, Okuma, Snk, Yasda

* 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