McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Length Length

	Head Type Head Type


Socket	Rounded

Hex	Flat

	Material Material

	Finish Finish

Black Oxide

Passivated

Zinc Plated

Zinc Yellow-Chromate Plated

	Drive Style Drive Style


Hex	External Hex

	Threading Threading

Fully Threaded

Partially Threaded

Threaded on Both Ends

	Thread Direction Thread Direction	Show

Left Hand

	Thread Direction Thread Direction	Hide

Right Hand

Left Hand

Right Hand and Left Hand

	Thread Type Thread Type

	Head Height Head Height

	Socket Head Profile Socket Head Profile

	Standard

	Thread Pitch Thread Pitch

	Fastener Strength Grade/Class Fastener Strength Grade/Class

	Thread Fit Thread Fit

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	Tensile Strength Tensile Strength

	Head Diameter Head Diameter

	Hardness Hardness

	Drive Size Drive Size

	Specifications Met Specifications Met

ASME

ASTM

DIN

ISO

SAE

	Head Width Head Width

	Component Component

	Ball Nut
	Ball Screw
	Collar
	Lead Screw
	Nut

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859 Products

Screws and Bolts

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.

Rounded Head Screws

A domed head sits above the surface of your material. Includes screws such as pan, button, binding, and truss head screws.

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.

Flat Head Screws

Flat and oval head screws are angled under the head to fit in countersunk holes.

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.

Other Screws

Threaded Rods

Threaded-Stud Knobs

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

Lead Screws and Screw Jacks

Screws for Carbide Insert Holders

When it's time to replace the screws in a carbide insert holder, use the reference number on your holder to find the right size.

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