Mil. Spec. Socket Head Cap Screws

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Specifications Met

ASME B18.3

ASTM Standard

Federal Specification

NAS

SAE AMS5737

Military Specification

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Material

Fastener Head Type

Socket Head Profile

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Threading

System of Measurement

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Metric

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Less than 100,000 psi

120,000 psi to 129,999 psi

130,000 psi to 149,999 psi

150,000 psi or greater

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DFARS Specialty Metals

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Countersink Angle

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Unified Standard Class 3A

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Export Control Classification Number (ECCN)

Flat Head Profile

Hardness

454 Products

About Socket Head Screws

Mil. Spec. Alloy Steel Socket Head Screws

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

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 Hex Drive Flat Head Screws

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

Mil. Spec. Stainless Steel
Hex Drive Flat Head Screws

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

Stainless Steel Thread-Locking
Hex Drive Flat Head Screws

Stainless steel screws have excellent corrosion resistance in most environments.

Stainless Steel Thread-Locking
Button Head Hex Drive Screws

Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. A nylon patch bonded to the threads adds friction to prevent loosening from vibration.

Metric Stainless Steel Thread-Locking
Button Head Hex Drive Screws

These metric 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic. A nylon patch bonded to the threads adds friction to prevent loosening from vibration.

Alloy Steel Thread-Locking
Button Head Hex Drive Screws

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

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About Socket Head Screws

Screws and Bolts

Mil. Spec. Alloy Steel Socket Head Screws

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

High-Strength A286 Stainless
Steel Socket Head Screws

Mil. Spec. Alloy Steel Hex Drive Flat Head Screws

Mil. Spec. Stainless Steel
Hex Drive Flat Head Screws

Stainless Steel Thread-Locking
Hex Drive Flat Head Screws

Stainless Steel Thread-Locking
Button Head Hex Drive Screws

Metric Stainless Steel Thread-Locking
Button Head Hex Drive Screws

Alloy Steel Thread-Locking
Button Head Hex Drive Screws

About Socket Head Screws

Screws and Bolts

Mil. Spec. Alloy Steel Socket Head Screws

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

High-Strength A286 StainlessSteel Socket Head Screws

Mil. Spec. Alloy Steel Hex Drive Flat Head Screws

Mil. Spec. Stainless SteelHex Drive Flat Head Screws

Stainless Steel Thread-LockingHex Drive Flat Head Screws

Stainless Steel Thread-LockingButton Head Hex Drive Screws

Metric Stainless Steel Thread-LockingButton Head Hex Drive Screws

Alloy Steel Thread-LockingButton Head Hex Drive Screws

High-Strength A286 Stainless
Steel Socket Head Screws

Mil. Spec. Stainless Steel
Hex Drive Flat Head Screws

Stainless Steel Thread-Locking
Hex Drive Flat Head Screws

Stainless Steel Thread-Locking
Button Head Hex Drive Screws

Metric Stainless Steel Thread-Locking
Button Head Hex Drive Screws

Alloy Steel Thread-Locking
Button Head Hex Drive Screws