2-56 Socket Head Cap Screws

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Less than 100,000 psi

100,000 psi to 119,999 psi

120,000 psi to 129,999 psi

130,000 psi to 149,999 psi

150,000 psi or greater

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Unified Standard Class 2A

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82°

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325 Products

About Socket Head Screws

Alloy Steel Socket Head Screws

The standard for high-strength fastening.

Mil. Spec. Alloy Steel Socket Head Screws

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

18-8 Stainless Steel Socket Head Screws

Use these general purpose 18-8 stainless steel screws for a variety of fastening applications. They have good chemical resistance.

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.

Super-Corrosion-Resistant 316
Stainless Steel Socket Head Screws

More corrosion resistant than 18-8 stainless steel screws, these 316 stainless steel screws have excellent resistance to chemicals and salt water.

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.

Plastic Socket Head Screws

Plastic screws are chemical and oil resistant, nonconductive, and lightweight.

Brass Socket Head Screws

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

Titanium Socket Head Screws

Our most corrosion-resistant metal screws, titanium screws withstand salt water, acids, and chemicals. They have a high strength-to-weight ratio and are about 40% lighter than steel screws.

Aluminum Socket Head Screws

Aluminum screws are one-third the weight of steel and have good corrosion resistance.

Alloy Steel Low-Profile Socket Head Screws

Made of alloy steel, these low-profile screws are nearly twice as strong as their stainless steel counterparts. With half the height of a standard socket head, these low-profile screws fit in tight spaces.

Alloy Steel Ultra-Low-Profile Socket Head Screws

Made from alloy steel, these screws are nearly twice as strong as stainless steel low-profile screws. With a head height one-third the size of a standard socket head, they fit in the tightest spaces.

High-Profile Socket Head Screws

With a head one and a half times taller than a standard socket head, these screws are easier to install in deep counterbored holes and other hard-to-reach places.

Vibration-Resistant Socket Head Screws

Alloy Steel Thread-Locking Socket Head Screws

With a tensile strength of 170,000 psi, these alloy steel screws are among the strongest we carry. They are stronger than Grade 8 steel screws and are nearly two and a half times stronger than stainless steel thread-locking screws. They have a thread locker to prevent loosening from vibration.

18-8 Stainless Steel Thread-Locking
Socket Head Screws

These screws have good chemical resistance. A thread locker bonded to the threads prevents loosening from vibration.

Stainless Steel Wire-Lockable Socket Head Screws

Stainless steel screws have excellent corrosion resistance in most environments. Wire these screws together for more vibration resistance than other types of socket head screws.

Alloy Steel Wire-Lockable Socket Head Screws

With a tensile strength of 170,000 psi, these alloy steel screws are among the strongest we carry. They are stronger than Grade 8 steel screws and are more than twice as strong as stainless steel wire-lockable screws. These resist vibration better than any other socket head screw.

Sealing Socket Head Screws

A rubber O-ring under the head of these screws prevents leaks and seals out contaminants.

Vented Socket Head Screws

Drilled through the head and shaft, these screws vent fluid and gases trapped below the screw, making them good for vacuum applications.

Vibration-Resistant Sealing Socket Head Screws

The nylon patch bonded to the threads of these socket head screws adds friction to keep vibration from loosening them, while their O-ring prevents leaks and seals out contaminants.

Flat Head Screws

Alloy Steel Hex Drive 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.

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.

Brass Hex Drive Flat Head Screws

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

Alloy Steel Torx Flat Head Screws

Made from alloy steel, these screws are twice as strong as standard steel Torx flat head screws.

18-8 Stainless Steel Torx Flat Head Screws

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

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.

Stainless Steel Thread-Locking
Hex Drive Flat Head Screws

Stainless steel screws have excellent corrosion resistance in most environments.

Vented Flat Head Screws

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

Rounded Head Screws

18-8 Stainless Steel Button Head Hex Drive Screws

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

316 Stainless Steel Button Head Hex Drive Screws

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

Alloy Steel Button Head Hex Drive Screws

Brass Button Head Hex Drive Screws

Brass button head screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

18-8 Stainless Steel Button Head Torx Screws

Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Torx and Torx-Plus drives have more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Steel Pan Head Torx Screws

These screws have a Torx or Torx-Plus drive for more points of contact than other drives, allowing you to tighten the screw without damaging the recess.

Painted Steel Pan Head Torx Screws

Create a decorative appearance on your finished product—the head of these screws is painted.

Stainless Steel Pan Head Torx Screws

Alloy Steel Flanged Button Head Screws

Made from alloy steel, these screws are nearly twice as strong as stainless steel button head screws. They have a flange that distributes pressure across a wide surface, eliminating the need for a separate washer.

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.

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.

About Socket Head Screws

Socket Head Screws

Alloy Steel Socket Head Screws

Mil. Spec. Alloy Steel Socket Head Screws

18-8 Stainless Steel Socket Head Screws

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

Super-Corrosion-Resistant 316Stainless Steel Socket Head Screws

High-Strength A286 StainlessSteel Socket Head Screws

Plastic Socket Head Screws

Brass Socket Head Screws

Titanium Socket Head Screws

Aluminum Socket Head Screws

Alloy Steel Low-Profile Socket Head Screws

Alloy Steel Ultra-Low-Profile Socket Head Screws

High-Profile Socket Head Screws

Vibration-Resistant Socket Head Screws

Alloy Steel Thread-Locking Socket Head Screws

18-8 Stainless Steel Thread-LockingSocket Head Screws

Stainless Steel Wire-Lockable Socket Head Screws

Alloy Steel Wire-Lockable Socket Head Screws

Sealing Socket Head Screws

Sealing Socket Head Screws

Vented Socket Head Screws

Vented Socket Head Screws

Vibration-Resistant Sealing Socket Head Screws

Vibration-Resistant Sealing Socket Head Screws

Flat Head Screws

Alloy Steel Hex Drive Flat Head Screws

18-8 Stainless Steel Hex Drive Flat Head Screws

316 Stainless Steel Hex Drive Flat Head Screws

Brass Hex Drive Flat Head Screws

Alloy Steel Torx Flat Head Screws

18-8 Stainless Steel Torx Flat Head Screws

Alloy Steel Thread-LockingHex Drive Flat Head Screws

Stainless Steel Thread-LockingHex Drive Flat Head Screws

Vented Flat Head Screws

Rounded Head Screws

18-8 Stainless Steel Button Head Hex Drive Screws

316 Stainless Steel Button Head Hex Drive Screws

Alloy Steel Button Head Hex Drive Screws

Brass Button Head Hex Drive Screws

18-8 Stainless Steel Button Head Torx Screws

Steel Pan Head Torx Screws

Painted Steel Pan Head Torx Screws

Stainless Steel Pan Head Torx Screws

Alloy Steel Flanged Button Head Screws

Stainless Steel Thread-LockingButton Head Hex Drive Screws

Alloy Steel Thread-LockingButton Head Hex Drive Screws

Super-Corrosion-Resistant 316
Stainless Steel Socket Head Screws

High-Strength A286 Stainless
Steel Socket Head Screws

18-8 Stainless Steel Thread-Locking
Socket Head Screws

Alloy Steel Thread-Locking
Hex Drive Flat Head Screws

Stainless Steel Thread-Locking
Hex Drive Flat Head Screws

Stainless Steel Thread-Locking
Button Head Hex Drive Screws

Alloy Steel Thread-Locking
Button Head Hex Drive Screws