Class 8 nuts are comparable in strength to Class 8.8 bolts and are suitable for fastening most machinery and equipment.

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

These nuts tighten when turned to the left; once fastened, they resist loosening from counterclockwise motion.

These nuts are about 25% stronger than medium-strength steel nuts.

Closely spaced metric threads prevent these nuts from loosening due to vibration. About 25% stronger than medium-strength steel nuts, these nuts are comparable in strength to Class 10.9 bolts.

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

About half the strength of medium-strength steel nuts, these nuts are for light duty fastening applications.

About half the strength of medium-strength steel nuts, these metric nuts are for light duty fastening applications.

These nuts tighten when turned to the left; once fastened, they resist loosening from counterclockwise motion.

These metric nuts are about 20% stronger than high strength steel nuts and are often used in heavy machinery.

These nuts have good chemical resistance and may be mildly magnetic. Metric 18-8 stainless steel is also known as A2 stainless steel.

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

These nuts tighten when turned to the left; once fastened, they resist loosening from counterclockwise motion.

These nuts have excellent chemical resistance and can be used in saltwater environments.

These nuts tighten when turned to the left; once fastened, they resist loosening from counterclockwise motion.

Hardened for added strength, these nuts are more corrosion resistant to chemicals and salt water than 18-8 stainless steel nuts.

These nuts resist sticking during installation and are comparable in strength to Grade 5 steel.

Commonly used to fasten structural parts and pumps, these nuts are comparable in strength to Grade 8 steel.

These metric nuts resist oil, grease, and solvents (except mineral acids).

Fiberglass nuts are stronger than nylon 6/6 nuts. They resist acids, solvents, salt water, and oil.

Polycarbonate nuts stand up to oil, grease, and detergents.

Glass-filled nylon nuts are stronger than nylon 6/6 nuts. They resist oil, grease, and solvents (except mineral acids).

For use in wet environments, acetal nuts resist alcohol, gasoline, and solvents.

These nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic.

These brass nuts resist rusting from water and have closely spaced threads to prevent loosening from vibration.

One-third the weight of steel, these metric aluminum nuts are corrosion resistant in wet environments and nonmagnetic.

These metric nuts are resistant to salt water, electrically conductive, and nonmagnetic.

These metric nuts have a high strength-to-weight ratio and resist acids and salt water.

More corrosion resistant than 400 nickel nuts, these nuts are often used in marine environments and chemical-processing plants.

These Class 10 nuts are about 25% stronger than medium-strength steel extra-wide hex nuts.

A nylon insert keeps metric bolt threads from coming loose due to vibration, wear, and temperature swings. About 25% stronger than medium-strength steel locknuts, these nuts are made of high-strength, Class 10 steel.

Made from Grade 5 steel, these inch-sized locknuts are suitable for fastening most machinery and equipment.

Get a grip on metric bolts exposed to vibration, wear, and changes in temperature. These metric locknuts have a nylon insert that holds onto bolts without damaging their threads.

Choose these locknuts for their adherence to strict military standards for material and construction. They’re low-strength steel, so they should be used for fastening panels and other light duty fastening applications.

These metric locknuts have good chemical resistance.

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

Brass locknuts are corrosion resistant in wet environments and electrically conductive.

Titanium locknuts have a high strength-to-weight ratio and are resistant to acids and salt water.

These metric locknuts have a free-spinning tooth lock washer that grips the material surface instead of threads for easy installation and mild vibration resistance.

These metric stainless steel locknuts have good chemical resistance and may be mildly magnetic.

These locknuts have a curved washer that acts as a spring for easy installation and mild vibration resistance. The smooth rim makes them less likely to scratch materials when tightened than locknuts with a tooth lock washer.

These locknuts have an irregularly shaped thread at the top of the nut that grips the bolt for a stronger hold than nylon-insert locknuts.

These Grade 9 locknuts are about 20% stronger than high-strength steel locknuts and are often used in heavy machinery, such as earth-moving equipment.

These locknuts have good chemical resistance.

These Grade 8 locknuts are about three times stronger than low-strength steel distorted-thread locknuts.

Use these locknuts for light duty fastening applications, such as securing access panels.

These locknuts have good chemical resistance.

Secure these metric nuts by inserting a cotter pin or safety wire through the slots and a drilled hole in your bolt for mild loosening resistance. Often referred to as castle nuts.

Stainless steel locknuts have excellent corrosion resistance in most environments.

Threads at the top of these locknuts expand to grip the bolt on all sides for a stronger hold than distorted thread locknuts.

Made from 18-8 stainless steel, these flex top locknuts have good chemical resistance and may be mildly magnetic.

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

The metric steel insert grips the threads and lifts away from the nut body when installed, isolating the insert from the nut's load to resist spinoff caused by vibration.

These locknuts, also known as Fuji locknuts, maintain their holding power with reuse longer than nylon-insert locknuts. They have a spring ring that creates tension as you tighten the nut, keeping them in place.

Strong enough for use in most machinery and equipment, these medium-strength metric nuts have serrations on the underside of the flange. The serrations prevent the nuts from loosening in applications with mild vibration.

These nuts are about 25% stronger than medium-strength steel flange locknuts.

Made from 18-8 stainless steel, these flange locknuts have good chemical resistance and may be mildly magnetic

These flange locknuts have excellent resistance to chemicals and salt water.

These flange locknuts are comparable in strength to Grade 8 bolts.

These flange locknuts have excellent resistance to chemicals and salt water. They have an irregularly shaped thread that grips the bolt for a stronger hold than nylon-insert flange locknuts.

Also known as collar nuts, these metric nuts have a flange that distributes pressure across the surface, so you don't need a washer. Made of high-strength Class 10 steel, they’re about 25% stronger than medium-strength steel flange nuts.

No need for a washer—these metric medium-strength steel nuts have a flange that distributes pressure across its surface the way a washer does. Made of medium-strength, Class 8 steel, they’re suitable for fastening most machinery and equipment.

Made to Japanese Industrial Standards, these nuts fasten most Japanese machinery and equipment without a washer.

About half the strength of medium-strength steel flange nuts, use these metric nuts in light duty fastening applications, such as securing access panels.

Skip the washer—these metric stainless steel nuts have a flange that does the same job, spreading pressure across its surface for a strong hold.

Fiberglass flange nuts are chemical resistant, nonconductive, and lightweight.