Flange Head Cap Screws | McMaster-Carr

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	Screw Features Screw Features	Show

Flanged

	Screw Features Screw Features	Hide

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Pitch Thread Pitch

	Length Length

	Head Type Head Type


Socket	Rounded

Hex	12-Point

	Material Material

	Finish Finish

Black Oxide

Black Phosphate

Black Ultra-Corrosion-
Resistant Coated

Passivated

Zinc Plated

Zinc Yellow-Chromate Plated

	Threading Threading

	Fully Threaded
	Partially Threaded

	Drive Style Drive Style


External 12- Point	External Hex

Hex	Slotted

	Fastener Strength Grade/Class Fastener Strength Grade/Class

	Thread Direction Thread Direction

	Right Hand

	Flange Diameter Flange Diameter

	Head Height Head Height

	Head Width Head Width

	Thread Type Thread Type

UNC

Metric

UNF

	Tensile Strength Tensile Strength

40,000 to 59,999 psi

60,000 to 79,999 psi

80,000 to 99,999 psi

100,000 psi or greater

Not Rated

	Thread Spacing Thread Spacing

Coarse

Fine

Extra Fine

	Thread Fit Thread Fit

	Drive Size Drive Size

	Rounded Head Style Rounded Head Style

	Button

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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About Hex Head Screws and Bolts

Flanged Socket Head Screws

These general purpose flanged screws distribute pressure where the screw meets the surface, eliminating the need for a washer.

Exact-Grip-Length Flanged Socket Head Screws

For use where sideways forces are a concern, these screws have a precisely measured unthreaded portion (grip) for a strong hold. Their flanged head distributes pressure where the screw meets the surface, so you don't need a washer.

Serrated-Flange Socket Head Screws

Serrations under the head grip the material's surface for mild vibration resistance. The flange distributes pressure across the material's surface, eliminating the need for a washer.

Flanged Rounded Head Screws

Ultra-Wide Flanged Rounded Head Screws

Don't crush thin materials. The flange on these screws is wider and thicker than our other flanged screws, so it distributes pressure the best.

Extra-Wide Flanged Rounded Head Screws

Comparable in diameter to a washer, the flange on these screws distributes pressure better than standard flanged screws.

Flanged Hex Head Screws

These screws have a flange that distributes pressure where the screw meets the surface, eliminating the need for a washer.

Serrated-Flange Hex Head Screws

Serrations under the head grip the material's surface for mild vibration resistance. The flange distributes pressure across the material's surface, eliminating the need for a separate washer.

Extra-Wide Serrated-Flange Hex Head Screws

These screws have a flange that's at least 10% larger than a standard flange for more gripping power. Serrations under the head provide mild vibration resistance.

Alloy Steel 12-Point Screws

Good for high-strength fastening, these screws are made from alloy steel comparable in strength to Grade 9 steel. The head makes 12 points of contact with a wrench to handle more torque than a socket head or hex head screw.

Stainless Steel 12-Point Screws

These hardened stainless steel screws combine excellent resistance to chemicals and solvents with strength comparable to Grade 9 steel. The head makes 12 points of contact with a wrench to handle more torque than a socket head or hex head screw.