Precision Control Knobs | McMaster-Carr

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Grip Style

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Stud Length

Head Diameter

1 1/2"

Head Height

5/16"

1/2"

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4 Products

Threaded-Stud Precise-Control Knobs

Knurled

Six Arm

Mount these knobs into a threaded hole. Turn the knob to move the stud 0.005" per graduation and make precise adjustments. Secure with the included locknut. Made of plastic, these knobs resist oil, grease, and solvents.

For technical drawings and 3-D models, click on a part number.

	Head				Stud
Thread Size	Dia.	Ht.	Material	Color	Lg.	Material	Temperature Range, °F	Features		Each
Knurled Grip
1/4"-20	1"	5/16"	Acetal Plastic	Black	2"	Steel	35° to 180°	Locknut	000000000	00000
Six Arm Grip
1/4"-20	1 1/2"	1/2"	Acetal Plastic	Black	3"	Steel	35° to 180°	Locknut	000000000	0000

Screw-Head Mount Precise-Control Knobs

Knurled

Six Arm

To build a custom precise-control knob or thumb screw, pair one of these knobs with a socket head screw. Press the knob and screw together using a bench vise or an arbor press. Then, turn the knob to move the screw 0.005" per graduation and make precise adjustments. Made of plastic, these knobs resist oil, grease, and solvents.

For technical drawings and 3-D models, click on a part number.

	Head
For Thread Size	Dia.	Ht.	For Screw Head Type	Material	Color	Temperature Range, °F		Each
Knurled Grip
1/4"-20	1"	5/16"	Socket	Acetal Plastic	Black	35° to 180°	000000000	00000
Six Arm Grip
1/4"-20	1 1/2"	1/2"	Socket	Acetal Plastic	Black	35° to 180°	000000000	0000