McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Type Thread Type

UNC

UNF

Metric

	Material Material

Steel

Stainless Steel

	Finish Finish

	Head Type Head Type


Hex	Socket

Rounded	Flat

Headless

	Length Length

	Threading Threading

	Fully Threaded
	Partially Threaded

	Drive Style Drive Style


External Hex	Hex	Slotted

	Head Height Head Height

	Locking Type Locking Type


Wire	Cotter Pin

	Tensile Strength Tensile Strength

	Head Diameter Head Diameter

	Drive Size Drive Size

	Vent Diameter Vent Diameter

	Thread Spacing Thread Spacing

Coarse

Fine

	Head Width Head Width

	Thread Fit Thread Fit

	Specifications Met Specifications Met

ASME

SAE

ASTM

Mil. Spec.

Fed. Spec.

NAS

DIN

ISO

	Grip Length Grip Length

	Hardness Hardness

	Thread Pitch Thread Pitch

	Hole Center-to-Grip Length Hole Center-to-Grip Length

537 Products

Drilled 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.

Rounded Head Screws

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

Vented Flat Head Screws

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

Vented Cup-Point Set Screws

Vented to allow fluid and gas to pass through.

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