McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Length Length

	Drive Style Drive Style


Hex	Torx

Tamper- Resistant Torx	Torx Plus

Tamper- Resistant Hex	Asymmetrical

	Material Material

	Finish Finish

	Threading Threading

	Fully Threaded
	Partially Threaded

	Head Height Head Height

	Thread Direction Thread Direction


Right Hand	Left Hand

	Rounded Head Profile Rounded Head Profile

Standard

Wide

	Head Diameter Head Diameter

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	Drive Size Drive Size

	Thread Type Thread Type

	Thread Pitch Thread Pitch

	Specifications Met Specifications Met

ASME

ISO

ASTM

Mil. Spec.

	Tensile Strength Tensile Strength

	Thread Fit Thread Fit

	Hardness Hardness

	Fastener Strength Grade/Class Fastener Strength Grade/Class


Class 8.8	Class 10.9

	Flange Diameter Flange Diameter

	Screw Features Screw Features


Flanged	Vented

	Minimum Thread Length Minimum Thread Length

3,039 Products

Screws and Bolts

Stainless Steel Button
Head Hex Drive Screws

Stainless steel screws have excellent corrosion resistance in most environments.

Alloy Steel Button Head
Hex Drive Screws

Made from alloy steel, these screws are nearly twice as strong as stainless steel button head screws.

Brass Button Head Hex Drive Screws

Brass screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

Titanium Button Head
Hex Drive Screws

Known for their high strength-to-weight ratio, these titanium screws are as strong as alloy steel and about 40% lighter. They stand up to salt water, acids, and chemicals.

Torx Rounded Head Screws

A Torx drive has more points of contact than other drives—allowing you to tighten the screw without damaging the recess.

Flanged Rounded Head Screws

The flange distributes pressure across a wider surface, eliminating the need for a separate washer.

Tamper-Resistant
Rounded Head Screws

Difficult to remove without special tools, use these screws in public spaces to reduce the risk of theft and tampering.

Vibration-Resistant
Rounded Head Screws

Prevent screws from loosening due to vibration. Includes screws with thread locker, screws with lock washers, and screws that are wire lockable.

Vented Rounded Head Screws

These screws are drilled through the shaft to vent fluids and gases trapped under the screw.

Left-Hand Threaded
Rounded Head Screws

Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion.

Tapping, Wood, and Drywall Screws

While other screws and bolts require holes with threads, tapping screws create their own threads.

Other Button Head Screws

Rounded Head Screw Assortments

These screws are also known as pan head and button head screws.

Fastener Caps

Conceal and protect screw heads and nuts.

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