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

Cleaned and double bagged in an ISO Class 5 (Fed. Std. Class 100) clean room, these screws are ready to use on chambers and components in high-vacuum systems.

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.

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

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

More corrosion resistant than stainless steel screws, nickel alloy screws have excellent resistance to salt water and some acids.

Nearly as strong as steel, these stainless steel screws won’t rust in outdoor, washdown, and other corrosive environments. With half the height of a standard socket head, these low-profile screws fit in tight spaces.

More corrosion resistant than 18-8 stainless steel screws, these 316 stainless steel screws have excellent resistance to chemicals and salt water. Their ultra-low-profile lets them fit in the tightest spaces.

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

Serrations under the head grip the material's surface for mild vibration resistance. The flange distributes pressure across the material's surface, eliminating the need for a washer.

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

A freely rotating washer distributes pressure over a wider area than a flange, preventing damage to your material's surface.

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.

These metric screws help prevent counterclockwise-moving parts from loosening. Use them for medium-strength fastening.

Choose these metric screws for high-strength fastening. Often used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems, these screws are at least 25% stronger than medium-strength steel screws.

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

Choose these screws for their excellent corrosion resistance—comparable to 316 stainless steel—and the strength of steel. Use them for high-strength fastening in chemical and marine applications.

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

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

Made to Japanese Industrial Standards, these Class 10.9 steel screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. The flange eliminates the need for a washer.

Made from 18-8 stainless steel, these screws have good chemical resistance. A flange under the head distributes pressure over the surface, eliminating the need for a washer.

More corrosion resistant than 18-8 stainless steel screws, these 316 stainless steel screws have excellent resistance to chemicals and salt water. A serrated flange provides mild vibration resistance.

These metric screws are suitable for fastening most machinery and equipment. They have a serrated flange that helps prevent loosening from vibration.

316 stainless steel screws resist corrosion from chemicals and salt water better than 18-8 stainless steel screws. They may be mildly magnetic.

These metric alloy steel screws are nearly twice as strong as stainless steel button head screws.

As strong as alloy steel and about 40% lighter, these metric titanium screws are known for their high strength-to-weight ratio. They stand up to salt water, acids, and chemicals.

These metric 316 stainless steel screws resist corrosion from chemicals and salt water better than 18-8 stainless steel screws. They may be mildly magnetic.

Made to Japanese Industrial Standards, these screws have narrower and shorter heads than standard Phillips pan head screws.

The most corrosion-resistant pan head screws we offer, these metric titanium screws withstand salt water, acids, and chemicals. They have a high strength-to-weight ratio.

These metric PEEK screws are reliable in harsh environments up to 500° F and withstand acids, bases, and salt solutions. All are chemical and oil resistant, nonconductive, and lightweight.

Made from polycarbonate, these metric pan head screws resist breaking in high-impact applications. They are chemical and oil resistant, nonconductive, and lightweight.

Made from 18-8 stainless steel, these metric screws have good chemical resistance and may be mildly magnetic. The extra-wide truss head distributes holding pressure to reduce the likelihood of crushing thin material.

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

Made from nylon, these screws are chemical and oil resistant, nonconductive, and lightweight.

Good for use outdoors and in washdown environments, these metric 18-8 stainless steel screws are more corrosion resistant than steel and nearly as strong. Their pan-shaped head sits nearly flat on the fastened surface, so there’s no need to countersink a hole.

Made from brass, these metric pan head screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

These metric PTFE screws withstand harsh chemicals and temperatures from -100° F to 500° F. They are nonconductive, lightweight, and resist wear due to their slippery surface.

The Torx or Torx-Plus drive on these metric screws have more points of contact than other drives, allowing you to tighten them without damaging the recess.

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

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

Made from 18-8 stainless steel, these metric screws have good chemical resistance and may be mildly magnetic. They have a flange that distributes pressure across a wide surface, eliminating the need for a separate washer.

Made from aluminum, these metric screws are lightweight and resist corrosion in wet environments. The flange is wider and thicker than our other flanged screws, so they distribute pressure the best.

With a flange comparable in size to a washer, these metric screws distribute pressure better than standard flanged screws. Made from 316 stainless steel, they have excellent resistance to chemicals and salt water. Screws may be mildly magnetic.

To prevent unwanted removal, these metric screws have a tamper-resistant Torx drive—also known as a pin-in Torx drive—that makes them difficult to unscrew without special tools. An O-ring under the head blocks leaks and seals out dust and dirt.

Nearly twice as strong as stainless steel button head screws, these metric screws are made from alloy steel. Their tamper-resistant Torx drive (also known as a pin-in Torx drive) makes them difficult to remove without special tools.

Made from stainless steel, these metric screws have good chemical resistance and may be mildly magnetic. The washer has sharp internal teeth that dig into surfaces to resist large amounts of vibration while the smooth outside edge provides a finished look. Also known as Sems screws, the washer rotates freely but is permanently attached.

These metric screws have a washer with sharp external teeth that dig into surfaces for maximum holding power and vibration resistance. Also known as Sems screws, the washer rotates freely but is permanently attached.

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

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.

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

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

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

These screws meet Japanese Industrial Standards.

Our most corrosion resistant screws, these metric titanium screws withstand salt water, acids, and chemicals.

These metric screws have a decorative, domed head that sits above the surface when installed.

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.

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

These metric screws are chemical and oil resistant, nonconductive, and lightweight. Exposure to moisture may cause them to expand.

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

These metric screws are twice as strong as standard steel Torx flat head screws.

With a tamper-resistant hex drive (also known as a pin-in hex drive), these metric screws are difficult to remove without special tools.

With an O-ring under the head, these metric screws seal out leaks and contaminants while also preventing unwanted removal.