McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Type Thread Type

	Material Material

	Thumb Screw Head Shape Thumb Screw Head Shape

	Length Length

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


Low	Raised

Flared Collar	Narrow

High

	Head Diameter Head Diameter

	Threading Threading

	Fully Threaded
	Partially Threaded

	Head Height Head Height

	Thread Spacing Thread Spacing

	Tensile Strength Tensile Strength

	Thread Fit Thread Fit

	Hardness Hardness

	For Screw Size For Screw Size

	Color Color

	Black		Off-White
	Gray		Red
	Yellow

	Grip Style Grip Style


Knurled	Two Arm

Six Arm	Single Arm

Three Arm	Five Arm

Four Arm

	Head Material Head Material

	Head Color Head Color

	Mount Type Mount Type


Press Fit	Clamp On

Threaded Stud

	Thread Pitch Thread Pitch

	Head Width Head Width

	Collar Diameter Collar Diameter

1,542 Products

Thumb Screws

Knurled-Head Thumb Screws

Roll the finely knurled, slip-resistant screw head between your fingers for controlled adjustment.

Plastic-Head Thumb Screws

These thumb screws have a lightweight and nonconductive plastic head and metal threads.

Thumb Screws with Holding Tip

Hold objects in place by exerting pressure at the tip.

Hex-Head Thumb Screws

When your thumb screw needs to be more than finger-tight, these allow you to use a wrench for more torque.

Spade-Head Thumb Screws

Wing-Head Thumb Screws

Wings provide more leverage than spade-head thumb screws for greater torque while tightening.

Plastic Thumb Screws

Plastic thumb screws are chemical resistant, lightweight, and nonconductive.

Latching Thumb Screws

The head fits through a slit in a latch or panel to hold it in place.

Handles and Knobs

Knobs

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

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