McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Mount Type Mount Type

Threaded Through Hole

Unthreaded Hole

Unthreaded Plug

Unthreaded Stud

Unthreaded Through Hole

Weld On

	Material Material

	Grip Style Grip Style


Knurled	Four Arm

Ribbed	Smooth

Seven Arm	Two Arm

Six Arm	Three Arm

Five Arm	Ball

Single Arm	Eight Arm

Recessed

	Stud Length Stud Length

	Handle Style Handle Style

	Head Diameter Head Diameter

	Color Color

	Black		Orange
	Red		Yellow
	Blue		Green
	Gray		White
	Off-White		Silver
	Clear		Gold

	Thumb Screw Head Shape Thumb Screw Head Shape


Round	Multi-Lobe

Four Arm	Two Arm

Wing	Spade

Rectangular	Hex

	Stud Material Stud Material

Steel

Stainless Steel

	Head Type Head Type


Thumb	Tee

Flat	Rounded

Socket

	Handle Length Handle Length

	Length Length

	Head Height Head Height

	Finish Finish

	Round-Head Thumb Screw Profile Round-Head Thumb Screw Profile


Low	Raised

Narrow	High

Flared Collar

	Threading Threading

	Fully Threaded
	Partially Threaded

	Hub Diameter Hub Diameter

	For Screw Size For Screw Size

	Thread Type Thread Type

	Hole Shape Hole Shape


Round	Square

Hex	Round with Keyway

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4,735 Products

Handles and Knobs

Handles

Position, tighten, and hold fixtures, equipment, and machinery.

Knobs

Knobs provide a secure grip to position, tighten, and hold fixtures, equipment, and machinery.

Crank Handles

Crank handles provide leverage to maximize force for turning and tightening. They are often used on cross-slide tables.

Pull Handles and Knobs

Open and close a variety of doors and drawers, including those on furniture, machines, and equipment.

Other Screw Handles

Thumb Screws

Thumb screws provide a secure grip for tightening and loosening by hand.

T-Bolts

The large T-shaped head provides a secure grip for steady tightening. It can also function as a handle for work-holding or an attachment point for straps and clamps.

Captive Panel Screws

Secure panels and enclosures while allowing access. Screws become part of the panel when installed, so they won't fall out and get lost.

Lead Screws and Nuts

Found in hand-powered clamps, vises, grates, doors, and work tables, lead screws and nuts have broad, square threads that are well suited for quick assembly, high clamping forces, and lifting and lowering heavy objects.

Quick-Release Shaft Collar Handles

These threaded handles take the place of a set screw, allowing you to move set screw shaft collars without additional tools—useful for when the collar serves as a stroke limiter or mounting clamp.

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