The washer on these screws has 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.

Made from stainless steel, these screws have good chemical resistance and may be mildly magnetic. All 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.

Sharp internal teeth 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 stainless steel 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.

Made from stainless steel, these screws have good chemical resistance and may be mildly magnetic. A curved washer protects delicate surfaces while providing constant tension. Also known as Square Cone Sems screws, the washer rotates freely but is permanently attached.

A zinc plating provides mild corrosion resistance.

As you tighten these metric screws, the split lock washer flattens to add tension and prevent loosening from small amounts of vibration. Also known as Sems screws, the washer rotates freely but is permanently attached.

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.

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

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

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.

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.

Stainless steel screws have excellent corrosion resistance in most environments. They have a split lock washer to create tension and resist 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.

These Grade 5 steel screws are over 70% stronger than our stainless steel wire-lockable hex head screws. Wire these screws together through the hole in the head to get more vibration resistance than any other screw.

Place a cotter pin through the hole in the shank to keep a nut from loosening. These screws have a stronger hold than screws with thread lockers or lock washers.

These Class 8.8 steel screws are suitable for fastening most machinery and equipment. They are over 50% stronger than stainless steel thread-locking screws. For vibration resistance, they have a thread locker bonded to the threads.

Also known as Sems screws, these screws have a permanently attached but freely rotating tooth lock washer that bites into the mating surface for vibration resistance.

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

About 20% stronger than medium-strength steel screws, these Grade 8 steel screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. Serrations under the flange provide mild vibration resistance.

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.

Made from 18-8 stainless steel, these metric set screws are chemical resistant. They have a nylon locking patch that grips threads to resist loosening.

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

These alloy steel set screws have a thin edge that digs into hard surfaces for a secure hold. A nylon locking element grips threads to resist loosening.

These metric alloy steel set screws dig into hard surfaces for a secure hold. They have serrations on the cup edge that grip the material surface to resist loosening.

These metric 18-8 stainless steel set screws are chemical resistant. They have serrations on the cup edge that grip the material surface to resist loosening.

Stainless steel set screws have excellent corrosion resistance in most environments.

Designed with a shoulder for the strength to handle side and shear loads.

These include a barrel and a screw.

Pair these screws with a barrel you already have or couple with a different barrel to create a custom fastener. Made from 18-8 stainless steel, they are chemical resistant.

Use these barrels with a screw you already have or pair with a different type of screw to create a custom fastener. Made from 18-8 stainless steel, they are chemical resistant.

Use these barrels with a screw you already have or pair with a different type of screw to create a custom fastener. Made from 316 stainless steel, they have excellent chemical resistance and can be used in saltwater environments.

Use these hex drive screws and binding barrels as a low-profile alternative to standard nut and bolt combinations.

Add length to a binding barrel.

Brass binding barrels and screws are corrosion resistant in wet environments and electrically conductive.

An unthreaded barrel allows quick assembly with a press or a hammer.

Plastic binding barrels and caps are chemical resistant, nonconductive, and lightweight.

Install in a cutout to create a secure joint between boards, butcher blocks, and countertops.

Create strong joints in wood and wood composite.

Install these binding barrels and screws with a standard slotted screwdriver. They require a special tool to remove.

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

Press these wing head nuts into a closed-end hole or thick panel in applications where the back of the panel is inaccessible. A quarter-turn locks and releases access panels, doors, and covers.

Press these rounded head nuts into the backside of a panel in applications where you have access to both sides of the panel. A quarter-turn locks and releases access panels, doors, and covers.

These rounded head nuts can be riveted into thin panels for a flush fit. They can be mounted without spaces between the panels. A quarter-turn locks and releases access panels, doors, and covers.

These rounded head screws have a nut that clips onto the edge of a thin panel, allowing you to mount the screw near edges. A quarter-turn locks and releases access panels, doors, and covers.

Install these socket head screws through a hole and thread on a retainer to keep secure—no special tools are required.

Install these rounded head screws through a hole and thread on a retainer to keep secure—no special tools are required.

These screws mount flush against the outer panel's surface for low-clearance applications.

The base flares out during installation, creating a backside flange in hard materials and near edges in panels up to 0.312" thick. Install with a flare-in installation tool and an arbor press.

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

Stainless steel screws have excellent corrosion resistance in most environments.

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

Made from stainless steel, these chemical-resistant bolts have a square neck that keeps them from turning when tightening a nut. They're commonly used in tight spaces with moving parts, such as grain elevators and other belting systems, because the smooth, low-profile head provides a flush fit when installed.

Made from Grade 5 steel, these bolts are suitable for fastening most machinery and equipment. These bolts are commonly used in tight spaces with moving parts, such as grain elevators and other belting systems, because the smooth, low-profile head provides a flush fit when installed. The square neck keeps these bolts from turning when tightening a nut.

Used on heavy equipment, such as plows, these bolts have a smooth head that's angled underneath to sit flush within countersunk holes. The square neck keeps these bolts from turning when tightening a nut.

Adhesive on both the internal and external threads keeps these inserts in place and holds screws tight.

Made of 18-8 stainless steel, these inserts have better corrosion resistance than black-phosphate steel.

These assortments include various sizes of thread-locking inserts.

A black-phosphate finish provides mild corrosion resistance.

Made of 18-8 stainless steel, these inserts have good corrosion resistance.

Forming the strongest hold of any of our threaded inserts, these inserts have a distorted internal thread to lock screws into place and keys that drive into surrounding material to prevent slipping and rotating.

A distorted thread grips the screw to resist loosening.

A dry film keeps the screw from sticking or binding in these inserts during installation.

Eliminating the need for primer, these inserts are coated to resist corrosion when installed in different materials.

Made of Nitronic 60 stainless steel, these inserts prevent the screw from binding or sticking without any coating or lubricant that could contaminate particle-free environments.

Made of nickel alloy, these inserts are more resistant to acids and salt water than stainless steel inserts.

A dry film keeps the screw from sticking or binding in these inserts during installation.

Assortments include various sizes of helical inserts and a tap, a drill bit, and an installation tool for each thread size.

These kits have short-, normal-, and long-reach inserts, an installation tool, and a tap.

These 18-8 stainless steel inserts have better corrosion resistance than brass inserts and may be mildly magnetic.

Made from brass, these inserts are nonmagnetic, corrosion resistant, and electrically conductive.

These aluminum inserts are 70% lighter than brass inserts, electrically conductive, and nonmagnetic. They have good corrosion resistance, which is comparable to brass but not as good as stainless steel.

The flange keeps these inserts from pulling through a hole. Press them in from the underside of material, and install a screw from the top of material.

70% lighter than stainless steel, these aluminum inserts are mildly corrosion resistant and nonmagnetic.

Push down on the inside of these inserts with an installation tool and they expand to hold firm in surrounding material.

Assortments include various sizes of inserts, a soldering iron, a ceramic insulation tube, and installation tips.

Install these inserts into plastic parts to create a secure base for fasteners.

Made from brass, these inserts are nonmagnetic, mildly corrosion resistant, and electrically conductive.

Assortments include various sizes of tapping inserts for hardwood.

Large threads cut into softwood such as particleboard for a strong hold.

Use where vibration is a concern—these tee nut inserts have distorted threads that lock screws in place.

Steel inserts have high strength for durability.

Fewer prongs than other tee nut inserts reduce the risk of splitting hardwood—these inserts have three short prongs.

Six prongs around the barrel of these inserts provide a strong hold and prevent them from loosening and twisting.