McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

0-80
2-56
4-40
6-32
8-32
10-24
10-32
1/4"-20
1/4"-28
5/16"-18
5/16"-24
3/8"-16
3/8"-24
1/2"-13
M0.5
M0.8
M0.9

	Length Length

	Material Material

Stainless Steel

Steel

	Finish Finish

Cadmium Plated

Passivated

	Head Type Head Type


Socket	Hex

Flat	Rounded

	Specifications Met Specifications Met

NAS

Mil. Spec.

Fed. Spec.

	Drive Style Drive Style


Hex	External Hex

Phillips	Slotted

	Threading Threading

	Fully Threaded
	Partially Threaded

	Tensile Strength Tensile Strength

	Head Diameter Head Diameter

	Head Height Head Height

	Head Width Head Width

	Thread Type Thread Type

	Thread Pitch Thread Pitch

0.125 mm

0.2 mm

0.225 mm

	Thread Fit Thread Fit

Class 2A

Class 3A

Not Rated

	Drive Size Drive Size

	Thread Spacing Thread Spacing

Coarse

Fine

	Hardness Hardness

	Minimum Thread Length Minimum Thread Length

	Rounded Head Style Rounded Head Style


Cheese	Pan

	Rounded Head Profile Rounded Head Profile

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251 Products

About Socket Head Screws

Mil. Spec. 18-8 Stainless
Steel Socket Head Screws

Choose these screws for their adherence to strict military standards for material and construction. Screws are 18-8 stainless steel for good chemical resistance.

High-Strength A286 Stainless
Steel Socket Head Screws

Often used to fasten parts in engines and turbines, these are our strongest stainless steel screws. They are comparable in strength to alloy steel with the corrosion resistance of 18-8 stainless steel.

Mil. Spec. Alloy Steel
Socket Head Screws

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

High-Strength Steel Hex Head
Screws with Phillips Drive

When clearance for a wrench is limited, these screws have a Phillips drive so you can install them with a screwdriver. They are used for high-strength fastening.

Mil. Spec. Stainless Steel
Pan Head Phillips Screws

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

Metric 18-8 Stainless Steel
Slotted Flat Head Screws

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

18-8 Stainless Steel Narrow
Cheese Head Slotted Screws

More corrosion resistant than steel, and almost as strong, these 18-8 stainless steel screws have a narrower head than pan head screws to fit into tight spaces. They’re often used in electrical panels and next to flanges and raised surfaces in humid, damp, and washdown environments, but will corrode if exposed to salt water or chemicals.

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About Socket Head Screws

Screws and Bolts

Mil. Spec. 18-8 StainlessSteel Socket Head Screws

High-Strength A286 StainlessSteel Socket Head Screws

Mil. Spec. Alloy SteelSocket Head Screws

High-Strength Steel Hex HeadScrews with Phillips Drive

Mil. Spec. Stainless SteelPan Head Phillips Screws

Metric 18-8 Stainless SteelSlotted Flat Head Screws

18-8 Stainless Steel NarrowCheese Head Slotted Screws

Mil. Spec. 18-8 Stainless
Steel Socket Head Screws

High-Strength A286 Stainless
Steel Socket Head Screws

Mil. Spec. Alloy Steel
Socket Head Screws

High-Strength Steel Hex Head
Screws with Phillips Drive

Mil. Spec. Stainless Steel
Pan Head Phillips Screws

Metric 18-8 Stainless Steel
Slotted Flat Head Screws

18-8 Stainless Steel Narrow
Cheese Head Slotted Screws