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OBSOLETE-Standard retention knob; CAT40, M16X2; 45°, Coolant through-See JM11122AHTHS

Category: Retention Knobs
Thread Size: M16X2.0
Angle: 45
Knob Diameter: 0.740
L1 Length: 0.4400
L2 Length: 0.640
Flange Thickness: 0.120
Hole Diameter: 0.281
Neck Diameter: 0.490
Pilot Diameter: 0.669
Shoulder Diameter: 0.930
Wrench Flat Diameter: 0.745
Socket Part #: RKW40
Number: JM11122A
Alternate Part: JM11122AHTHS
Country of Origin: USA

This knob is a replacement for the following parts:

ManufacturerPart Number
Retention Knob Supply: RK111-22A
Sandvik: 393.2940-40 022
Seco: 1613
Techniks: 17834
Kenn 2: 2878491
Command: RS4M-0105
Davies: PSC-478
Kennametal: RK40AV1M
Lyndex: B40-STD*
MSC: 1401637
Parlec: A40TRK
For Machines (see disclaimer)*: Fadal, Hurco, Milltronics, Wele/Toyoda

* 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