Carr Lane CL-527-TSA | 5/16-18" Thread Adjustable-Torque Thumb Screw

Adjustable-Torque Thumb Screws

Knurled-head thumb screw that exerts positive, repeatable force. Clockwise, the knob de-clutches and turns freely when you reach the desired torque. Counterclockwise, the knob locks for positive retraction. Adjustable-Torque Thumb Screws are furnished with your choice of swivel foot, and a Knurled Check Nut. Due to their small size, #10 and M5 thumb screws have a dog point instead of a swivel foot. Made in USA.

Application Information

Adjustment

To set desired force, first remove the outer cover screw at the side of the knob, to expose the adjustment screw. Next, insert a hex wrench to turn the adjustment screw until desired torque is achieved. Reinstall the outer cover screw when Finished. Torque can be adjusted from 3 to 6 inch-lbs, resulting in a contact force of 10 to 125 lbs, but these values are approximate. Force can vary +/- 30% depending on lubrication and other operating conditions.

Swivel Foot

Adjustable-Torque Thumb Screws use the patented left-hand-thread swivel-foot system. The ball end of the body screws into the foot for easy installation and removal. Once the ball threads pass beyond the foot threads, the foot can rotate and pivot freely (20° total angle). Foot threads are left-hand to positively prevent accidental backout during use.

Material

Steel
Item	Material	Heat Treat	Finish	DFARS	RoHS
Screw Body	1215 Steel	Caburized-Hardened	Black Oxide	Yes	Yes
Knob,Check Nut and Steel Foot	1215 Steel	-	Black Oxide	Yes	Yes
Spring	302 Stainless or Music Wire	-	-	Yes	Yes
Delrin Foot	White Delrin 500	-	-	Yes	Yes

Parts Specification

A Thread (Inch)	B (Inch)	C (Inch)	D Diameter (Inch)	Torque Adjustment Range (in-lbs)	End-force Adjustment Range (lbs)
5/16-18"	2-3/4"	21/32"	15/16"	3-6 in-lbs	10-125 lbs