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 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.

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.

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.

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.

Internal teeth dig into the screw head while the smooth outside edge won't snag objects. Use with metric fasteners that have small heads, such as fillister and cheese head screws.

Slightly domed with an oversized outside diameter, these washers distribute your fastener's load over a larger surface area than other internal-tooth lock washers to limit damage to soft material.

Teeth on the outside edge of these metric washers bite into the screw head and joint for a tight grip.

The teeth on these washers firmly grip heads of 82° flat head countersunk screws.

To keep 90° countersunk screws from loosening in vibration applications, the teeth on these washers bite further into the screw head and joint than standard external-tooth lock washers for a more secure hold.