Twice as strong as low-strength steel screws, these metric Class 8.8 steel screws can be used to fasten most machinery and equipment.

Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. For use in medium-strength fastening applications.

Choose these screws for their adherence to strict military standards for material and construction. Use them to fasten most machinery and equipment.

Made from Grade 8 steel, these 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.

These screws come with a traceable lot number and a physical and chemical test report. Use them for high-strength fastening.

Tighten these screws by turning them to the left; once fastened, they prevent counterclockwise-moving parts from loosening. For use in high-strength fastening applications.

Our strongest steel screws, these have a tensile strength of 180,000 psi—about 20% stronger than our high-strength steel screws. They're often used for heavy duty stamping applications or on earth-moving equipment such as bulldozers and excavators.

The standard choice for fastening in wet and outdoor conditions. Made of 18-8 stainless steel, these screws resist corrosion from mild chemicals and water.

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

Made of Nitronic 60 stainless steel, these screws have a slippery surface that keeps them from sticking or binding during installation. Often used in clean rooms, they thread smoothly without coatings or lubricants that could contaminate particle-free environments.

Bronze screws are 30% stronger than brass screws and provide more corrosion resistance to salt water, gases, and sewage. They are nonmagnetic and electrically conductive.

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

Fiberglass screws are stronger than plastic screws, chemical and oil resistant, nonconductive, and lightweight.

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.

More than twice as strong as screws made of 400 nickel, these 718 nickel screws can handle the same extreme stress as our strongest steel screws.

In oxygen-free environments, such as vacuum furnaces, these molybdenum screws can handle blistering temperatures up to 2900° F. They’re thermally conductive, so heat passes through quickly without deforming them.

Made of 18-8 stainless steel, these Grade B8 screws resist corrosion from mild chemicals and water. Also known as pressure bolts, these screws meet the high-pressure and high-temperature regulations of ASTM A193.

Made from Grade L7 steel, these screws don’t become brittle in the cold, so they stand up to impact even at temperatures as low as -150° F.

About 25% stronger than medium-strength steel heavy hex head screws, these screws hold up to the high stress of joining I-beams and scaffolds. Also known as structural bolts, they meet ASTM A490 and F3125 standards for structural applications.

Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. The flange distributes pressure where the screw meets the surface, so you don’t need a separate washer.

When a wrench won’t fit, turn these screws with a Phillips screwdriver instead. Made of 18-8 stainless steel, they resist corrosion from mild chemicals and water. The flange distributes pressure where the screw meets the surface, so you don’t need a separate washer.

Made from Grade 8 steel, these 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 distributes pressure where the screw meets the surface, so you don’t need a separate washer.

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 distributes pressure where the screw meets the surface, eliminating the need for a separate washer.

Twice as strong as low-strength steel screws, these Grade 5 screws are suitable for fastening most machinery and equipment. The flange distributes pressure where the screw meets the surface, so you don’t need a separate washer.

About half as strong as medium-strength steel screws, these screws are best for light duty fastening applications, such as securing access panels. The flange distributes pressure where the screw meets the surface, so you don’t need a separate washer.

When there’s not enough room to turn these screws with a wrench, slip a screwdriver into their Phillips drive. About half as strong as medium-strength steel screws, they’re best for light duty fastening applications, such as securing access panels. The flange distributes pressure where the screw meets the surface, so you don’t need a separate washer.

These screws are chemical and oil resistant, nonconductive, and lightweight. The flange eliminates the need for a washer, distributing pressure where the screw meets the surface.

One-third the weight of steel screws, these aluminum screws also resist corrosion from salt water and mild chemicals. The flange distributes pressure where the screw meets the surface, so you don’t need a separate washer.

Choose these screws for high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. Serrations under the head grip the surface of your material to help resist vibration.

Twice as strong as low-strength steel screws, these Class 8.8 steel screws can be used to fasten most machinery and equipment. Serrations under the head grip the surface of your material to help resist vibration.

When there’s not enough room to turn these screws with a wrench, slip a screwdriver into their Phillips drive. About half as strong as medium-strength steel screws, they’re best for light duty fastening applications, such as securing access panels. Their flange is serrated to help prevent loosening from vibration.

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.

Keep compatible screws, nuts, and washers on hand to make a strong joint. Twice as strong as low-strength steel screws, these Class 8.8 steel screws can be used to fasten most machinery and equipment.

Also known as Sems screws, these screws have a washer that’s permanently attached but rotates freely. The washer has sharp teeth around the outside edge that bite into the screw and the material it's installed on for vibration resistance. Twice as strong as low-strength steel screws, these Grade 5.1 screws are suitable for fastening most machinery and equipment.

Made from 18-8 stainless steel, these screws have the best chemical and corrosion resistance of our wire-lockable screws. Wire these screws together for more vibration resistance than other types of hex head screws.

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.

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

Also known as Sems screws, these screws have a permanently attached but freely rotating tooth lock washer that grips the screw and your material for vibration resistance. When a wrench won’t fit, turn these screws with a slotted screwdriver instead.