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.

With a shorter hex height than standard DIN 985 locknuts, these nylon-insert locknuts meet international ISO 10511 dimensional standards and are easy to install in tight spaces.

These Grade 8 locknuts are about 25% stronger than medium-strength steel thin locknuts.

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

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

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

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

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

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.

About half the strength of medium-strength steel locknuts, these are for light duty fastening applications, such as securing access panels.

These locknuts have good chemical resistance.

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

Strong enough for use with most machinery and equipment, these Class 8 metric locknuts have an irregularly shaped thread in the middle of the nut that grips bolts tighter than nylon-insert locknuts.

These locknuts have good chemical resistance.

Threads at the top of these metric 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.

Stainless steel locknuts have excellent corrosion resistance in most environments.

Stainless steel locknuts have excellent corrosion resistance in most environments.

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.

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 are suitable for fastening most machinery and equipment.

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.

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.

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

Grip metric bolts more securely than nylon-insert flange locknuts—the irregularly shaped threads on these locknuts hold extra tight. They resist vibration and sudden shocks, even after multiple uses.

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.

They're about 25% stronger than medium-strength steel flange locknuts and comparable in strength to Class 10.9 bolts.

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.

All of these stainless steel panel nuts have some chemical resistance.

These panel nuts are knurled to provide a secure grip for tightening and loosening by hand.

The nylon cap covers and grips the threads to resist loosening.

These press-fit nuts have a nylon insert that grips threads to resist loosening.

These metric nuts have good chemical resistance and may be mildly magnetic.

Also known as clinch style captive nuts, press these nuts into a drilled or punched hole with an arbor press or similar pressure tool.

These press-fit nuts have a zinc plating for corrosion resistance in wet environments.

Also known as broach style captive nuts, these nuts have good chemical resistance and may be mildly magnetic.

Difficult to grasp with standard hand tools, these metric nuts have sloped sides to reduce the risk of unwanted removal.

These nuts have serrations that dig into the material surface to resist loosening and are narrow to fit in tight spaces. Install with a serrated-edge driver.

Tri-groove nuts are narrower than sloped and drilled spanner nuts to fit in tight spaces. Install with a tri-groove socket bit and either a drive handle or an open-end wrench.

Attach these metric slip-on nuts at any point on a threaded rod for quick installation.

Stainless steel sealing nuts have excellent corrosion resistance in most environments.

Also known as flat-style speed nuts, these have large sides, so they're easy to push over threads by hand.

With flexible teeth that slide smoothly over threads of any pitch, these push nuts can be used alone for light-duty applications or as a jam nut.

These washers have smaller outside diameters than standard spring lock washers to fit neatly under socket head cap screws.

The arched shape of these washers presses up against a bolt and down against a nut to prevent loosening from wear, vibration, or temperature changes.