Polypropylene Knobs | McMaster-Carr

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	Material Material

Plastic

Zinc

	Handle Material Handle Material

Plastic

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Grip Style Grip Style


Ball	Five Arm

Four Arm	Knurled

Ribbed	Single Arm

Smooth	Three Arm

Two Arm

	Mount Type Mount Type


Adhesive	Clamp On

Press Fit	Screw

Strap	Threaded Hole

Threaded Stud

	Head Diameter Head Diameter

	Stud Length Stud Length

	Color Color

	Black		Red
	Green		White

	Thread Direction Thread Direction

	Right Hand

	Hub Height Hub Height

	Head Height Head Height

	Hub Diameter Hub Diameter

	Insert Material Insert Material

Brass

Steel

	Thread Depth Thread Depth

	Hole Shape Hole Shape

	Round

	Maximum Temperature Maximum Temperature

Less than 150° F

150° to 199° F

200° to 249° F

	Minimum Temperature Minimum Temperature

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

DFARS Specialty Metals
COTS-Exempt

	Finish Finish

Powder Coated

Rubber Coated

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

REACH Compliant

	Grip Material Grip Material

Plastic

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327 Products

Knobs

Threaded-Stud Knobs

Mount these knobs into a threaded hole. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Comfort-Grip Threaded-Stud Knobs

A rubber coating provides a comfortable grip to position, tighten, and hold fixtures, equipment, and machinery. Mount these knobs into a threaded hole.

Vibration-Resistant Threaded-Stud Knobs

Bonded to the stud is an acrylic adhesive that adds friction to resist loosening from vibration. Use these knobs to position, tighten, and hold fixtures, equipment, and machinery. They mount into a threaded hole.

Threaded-Hole Knobs

Install these knobs on a threaded stud. They provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Comfort-Grip Threaded-Hole Knobs

A rubber coating provides a comfortable grip to position, tighten, and hold fixtures, equipment, and machinery. Install these knobs on a threaded stud.

Threaded Through-Hole Knobs

Long shafts can thread through these knobs for mounting versatility. The knobs provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Comfort-Grip Threaded Through-Hole Knobs

A rubber coating provides a comfortable grip to position, tighten, and hold fixtures, equipment, and machinery. Long shafts can thread through these knobs for mounting versatility.

Vibration-Resistant Threaded Through-Hole Knobs

Like locknuts, these knobs have a nylon insert that grips threads to resist loosening. Long shafts can thread through these knobs for mounting versatility. Use the knobs as a 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.

Threaded-Hole Ball Knobs

Install these traditional, easy-to-grip ball knobs on a threaded stud. They're good for control levers and push-pull rods.

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.

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.

Steering Wheel Knobs

Often used on pallet and lift trucks, these knobs attach to steering wheels for one-hand operation.

Handles

Comfort-Grip Adjustable Handles

A soft textured surface provides a comfortable grip for applications involving frequent positioning, tightening, and holding adjustments. Lift the handle to rotate freely; then release the handle to engage and tighten. These handles are also known as clamping handles.

Tapered Lever Handles

Use these handles as grips on hand wheels and cranks to operate machinery.

Strap Handles

Use these handles on cans, hoses, ladders, and other objects that weigh up to 30 lbs.

Tape Handles

With adhesive at both ends, these plastic strips stick to boxes, bags, and other objects to create a carrying handle.

Unthreaded-Hole Spoked Hand Wheels

Tap custom threads or drill a hole in the side of the hub to secure with a set screw. The spoked design allows a better grip around the rim than solid hand wheels to manually adjust valves, presses, and machine components.

Unthreaded Through-Hole Crank Handles

Round long shafts can pass through these handles for mounting versatility. Create custom threads or drill a hole in the side of the hub to secure with a set screw. Often used on cross-slide tables, these crank handles provide leverage to maximize force for turning and tightening.