McMaster-Carr

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	Material Material

Brass

Nickel

Steel

Zinc

	Finish Finish

Brass Plated

Nickel Plated

Painted

	System of Measurement System of Measurement

Inch

	Thread Size Thread Size

	Thread Type Thread Type

UNC

UNF

	Head Type Head Type


Hex	Socket

Flat	Headless

	Threading Threading

	Fully Threaded
	Partially Threaded

	Length Length

	Specifications Met Specifications Met

ASME

ASTM

Mil. Spec.

	Drive Style Drive Style


External Hex	Hex	Phillips

	Thread Spacing Thread Spacing

Coarse

Fine

	Thread Direction Thread Direction

	Right Hand

	Head Height Head Height

	Head Width Head Width

	Thread Fit Thread Fit

Class 2A

Class 3A

	Tensile Strength Tensile Strength

70,000 psi

80,000 psi

	Hardness Hardness

Rockwell B60

Rockwell B80

Not Rated

	Socket Head Profile Socket Head Profile

	Standard

	Keying Keying

Keyed Alike

Keyed Differently

Master Keyed

	Head Diameter Head Diameter

	Drive Size Drive Size

	Minimum Thread Length Minimum Thread Length

	Shoulder Diameter Shoulder Diameter

172 Products

Screws and Bolts

Hex Head Screws

Hex head screws are easy to install with a wrench for a secure hold. Use them with a nut or in tapped holes.

Socket Head Screws

With a deeper drive than flat and rounded head screws, socket head screws withstand more torque for a tighter hold. Install in a counterbored hole or above the surface.

Shoulder Screws

A cylindrical shoulder under the head allows parts to rotate around and slide along its length, so these screws are often used to guide and align components.

Set Screws

Unlike screws that hold materials together with threads, set screws exert pressure at the tip to hold objects in place.

Tapping, Wood, and Drywall Screws

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

Other Bolts

Nickel Alloy Threaded Rods

Nickel threaded rods are more resistant to acids and salt water than stainless steel threaded rods.

Locks and Latches

Through-Panel-Mount Connectors

Before making a permanent connection, use these connectors to test a circuit. Also known as binding posts, they mount through panels to create a connection point.

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