Flat Head Socket Screws | McMaster-Carr

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	Head Type Head Type	Show

	Flat

	Head Type Head Type	Hide


Socket	Flat

Rounded	Headless

Hex	Thumb

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Length Length

	Material Material

Steel

Stainless Steel

Brass

	Finish Finish

	Drive Style Drive Style


Hex	Phillips	Slotted

	Countersink Angle Countersink Angle

	Threading Threading

	Fully Threaded
	Partially Threaded

	Flat Head Profile Flat Head Profile


Standard	Undercut

	Head Diameter Head Diameter

	Thread Direction Thread Direction


Right Hand	Left Hand

	Head Height Head Height

	Size Size

	Specifications Met Specifications Met

	Thread Type Thread Type

	Thread Pitch Thread Pitch

	Thread Spacing Thread Spacing

Coarse

Fine

	Tensile Strength Tensile Strength

50,000 to 59,999 psi

60,000 to 99,999 psi

100,000 psi or greater

Not Rated

	Thread Fit Thread Fit

Class 3A

Class 5g6g

Class 6g

	Hardness Hardness

	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 Flat Head Screws

18-8 Stainless Steel Hex Drive Flat Head Screws

These 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic.

Metric 18-8 Stainless Steel Hex Drive Flat Head Screws

These metric 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic.

316 Stainless Steel Hex Drive Flat Head Screws

More corrosion resistant than 18-8 stainless steel screws, these screws have excellent resistance to chemicals and salt water. They may be mildly magnetic.

Metric 316 Stainless Steel Hex Drive Flat Head Screws

More corrosion resistant than 18-8 stainless steel screws, these metric screws have excellent resistance to chemicals and salt water. They may be mildly magnetic.

Fine-Thread Metric 316 Stainless
Steel Hex Drive Flat Head Screws

Closely spaced threads on these screws fit in holes with a fine pitch. They're not compatible with standard metric threads.

Mil. Spec. Stainless Steel Hex Drive Flat Head Screws

Choose these screws for their adherence to strict military standards for material and construction.

Alloy Steel Hex Drive Flat Head Screws

Metric Alloy Steel Hex Drive Flat Head Screws

Mil. Spec. Alloy Steel Hex Drive Flat Head Screws

Choose these screws for their adherence to strict military standards for material and construction.

Brass Hex Drive Flat Head Screws

Brass screws are electrically conductive, nonmagnetic, and have good corrosion resistance.

Metric Brass Hex Drive Flat Head Screws

These metric brass screws are electrically conductive, nonmagnetic, and have good corrosion resistance.

Stainless Steel Thread-Locking
Hex Drive Flat Head Screws

Stainless steel screws have excellent corrosion resistance in most environments.

Alloy Steel Thread-Locking Hex Drive Flat Head Screws

Made from alloy steel, these screws are nearly twice as strong as stainless steel flat head screws.

Metric Left-Hand Threaded Flat Head Screws

Tighten these metric screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion.

Left-Hand Threaded Flat Head Screws

Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion.

Metric Vented Flat Head Screws

To vent fluids and gases trapped under the screw, these metric screws are drilled through the shaft.

Vented Flat Head Screws

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

Fastener Assortments

Fastener Maintenance Assortments

Flat Head Screw Assortments

Flat head screws are angled under the head to fit flush within countersunk holes.