Our Retention Knobs have better finishes than are required by International Standards, reducing the likelihood of cracking. J&M is the leader in manufacturing certified, quality Retention Knobs and Pull Studs.

Fill out the following information to order your custom retention knob. Required information in bold print.
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Machine Make:		Model:
Spindle Size:		Max RPM:
Tool Holder Thread:		Metric	English
Coolant Through Spindle?		Yes	No
Spindle Coolant High Pressure?		Yes	No
Does Retention Knob Have O-Ring?		Yes	No
Location of O-Ring:
Pilot?		Yes	No
Number of Knobs Required:
Date Required:
Notes: