Countersunk Bolts | McMaster-Carr

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	System of Measurement System of Measurement

	Thread Size Thread Size

	Head Type Head Type


Flat	Oval

	Drive Style Drive Style


Hex	Phillips	Slotted

Torx Plus	Torx	Tamper- Resistant Torx

Square	Tamper- Resistant Hex	Drilled Spanner

	Material Material

Stainless
Steel

	Finish Finish

Black Phosphate

Ultra-Corrosion-Resistant
Coated

Zinc Yellow-Chromate Plated

	Flat Head Profile Flat Head Profile


Standard	Undercut

	Threading Threading

	Fully Threaded
	Partially Threaded

	Head Diameter Head Diameter

	Countersink Angle Countersink Angle

	Head Height Head Height

	Thread Type Thread Type

	Thread Pitch Thread Pitch

	Drive Size Drive Size

	Thread Direction Thread Direction


Right Hand	Left Hand

	Tensile Strength Tensile Strength

Less than 60,000 psi

60,000 to 99,999 psi

100,000 to 119,999 psi

120,000 to 139,999 psi

140,000 psi or greater

	Thread Spacing Thread Spacing

	Specifications Met Specifications Met

DIN

ISO

Mil. Spec.

SAE

Fed. Spec.

NAS

	Thread Fit Thread Fit

	Hardness Hardness

	Screw Size Screw Size

	Tip Type Tip Type


Pointed	Drilling

Flat	Extended

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6,062 Products

Screws and Bolts

Flat Head Screws

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

Binding Barrels and Screws

Use these as a low-profile alternative to standard nut and bolt combinations.

Plow Bolts

Plow Bolts

Used on heavy equipment, such as plows, these bolts have a smooth head that's angled underneath to sit flush within countersunk holes. The neck shape keeps them from turning when tightening a nut.

Tapping, Wood, and Drywall Screws

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

Other Countersunk Bolts

Screw Assortments

Screw Assortments

Concealed Fastener Kits
for Outdoor Flooring

Concealed Fastener Kits for Outdoor Flooring

Attach deck and platform flooring without unsightly screw holes. These kits conceal screw holes that can snag shoes and show wear over time.

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The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)