Unthreaded Knobs | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	Hole Diameter Hole Diameter

	Material Material

	Head Diameter Head Diameter

	Mount Type Mount Type


Screw	Create-Your- Own Hole

Press Fit	Clamp On

	Grip Style Grip Style


Knurled	Ribbed

Four Arm	Ball

Six Arm	Five Arm

Seven Arm	Smooth

Three Arm	Eight Arm

Single Arm	Two Arm

	Hole Shape Hole Shape


Round	Square

	Hub Diameter Hub Diameter

	Color Color

	Black		Clear
	Red		Yellow
	Gray		Orange

	Head Height Head Height

	For Screw Size For Screw Size

	Hub Height Hub Height

	Hole Depth Hole Depth

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Set Screw Included Set Screw Included

Yes

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	For Shaft Type For Shaft Type

Round

D-Profile

	Set Screw Thread Size Set Screw Thread Size

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

	For Screw Head Type For Screw Head Type

Socket

Hex

	Number of Pieces Number of Pieces

359 Products

Knobs

Unthreaded-Hole Knobs

Tap custom threads or secure with a set screw to provide a firm grip to position, tighten, and hold fixtures, equipment, and machinery.

Unthreaded-Hole Knobs with Handle

A handle makes these knobs easy to turn. Tap custom threads or secure with a set screw to provide a firm grip to position, tighten, and hold fixtures, equipment, and machinery.

Unthreaded Through-Hole Knobs

Create custom threads or secure with a set screw to provide a firm grip to position, tighten, and hold fixtures, equipment, and machinery. Long shafts can pass through these knobs for mounting versatility.

Square-Through-Hole Knobs

Primarily used on spigot valves, slide these knobs over valves with a square stem and secure them in place with your fastener.

Machinable-Hub Knobs

Mill specific holes or keyways in the hub to meet your specifications, or weld in place. These knobs provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Palm-Grip Machinable-Hub Knobs

The domed top allows you to firmly hold these knobs in the palm of your hand. Mill specific holes or keyways in the hub to meet your specifications, or weld in place. Use these knobs to position, tighten, and hold fixtures, equipment, and machinery.

Machinable-Hub Knobs with Handle

A handle makes these knobs easy to turn. Mill specific holes or keyways in the hub to meet your specifications, or weld in place. These knobs provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Screw-Head Mount Knobs

To build a custom knob or thumb screw, pair one of these knobs with a hex or socket head screw. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Screw-Head Mount Knob Assortments

Keep a convenient selection of knobs on hand. To build a custom knob or thumb screw, pair one of these knobs with a socket head screw. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Oversized-Grip Screw-Head Mount Knobs

Convert screws into knobs so large you can grip them with heavy work gloves. Slip these knobs onto a hex or socket head screw and tighten the set screw to secure. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Screw-Head Mount Knobs with Messages

Use these knobs to display important messages. To build a custom knob or thumb screw, pair one of these knobs with a socket head screw. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Indicating Knobs

Control devices with round or D-shaped shafts and view settings at a glance with a pointer.

Comfort-Grip Indicating Knobs

A rubber coating or construction provides a comfortable grip. Use these knobs to control devices with round or D-shaped shafts and view settings at a glance with a pointer.

Choose-a-Color Indicating Knobs

Quickly identify equipment controls and components by their color. Use these knobs to control devices with round shafts and view settings at a glance with a pointer.

Turn-Counting Indicating Knobs

For monitoring the number of shaft turns on instrumentation, these knobs have easy-to-read scales or digits for quick and accurate readings. Use them on devices with round shafts.

Dual-Control Comfort-Grip Indicating Knobs

These dual-control knobs operate independently to control two settings. They have a rubber coating for a comfortable grip. Use them on devices with round shafts to view settings at a glance with a pointer.

Unthreaded-Hole Ball Knobs

Tap custom threads or drill a hole in the side of the knob to secure with a set screw. These easy-to-grip ball knobs are good for control levers and push-pull rods.

Screw-Head Mount Precise-Control Knobs

To build a custom precise-control knob or thumb screw, pair one of these knobs with a socket head screw. Turn the knob to move the screw 0.005" per graduation and make precise adjustments.

Machinable-Hub Bar Knobs

Mill specific holes or keyways in the hub to meet your specifications or weld in place. Insert a bar between the arms and twist. The bar provides maximum leverage to tighten knobs securely.

Unthreaded Through-Hole Pull Knobs

Fasten these knobs directly to the front of your surface to open and close a variety of doors and drawers, including those on furniture, machines, and equipment.