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304 Stainless Steel Metric Lock Nuts
M2 / M2.5 / M3 / M4 / M5 / M6 / M8 / M14
304 Stainless Steel Imperial Lock Nuts
2-56 / 4-40 / 8-32 / 10-24 / 10-32, 1/2, 1/4, 3/8, 5/16
Black Metric Lock Nuts
M2 / M2.5 / M3 / M4 / M5 / M6 / M8 and M2-M8 Assortment Kit
Black Imperial Lock Nuts
4-40, 6-32, 8-32, 10-32, 1/4
Metric Nylock Size Map from M2 to M8
Size Map
Nylon lock nuts differ from a standard hex nut in that they have a nylon insert secured within the nut. The nylon insert is located in a tapered section located at the back of the nut. When you install the nylon lock nut onto a bolt or threaded stud, the nylon insert wraps around the threads and locks the nut in place. This gives a nylon lock nut a distinct advantage over a lock washer when the bolt or threaded stud is subject to vibration, as the nylon lock nut is unaffected by vibration.
How to Use a Nylon Lock Nut
- Examine the nylon insert of the nylon lock nut to ensure that the insert is not damaged.
- Thread the nylon lock nut onto the bolt or threaded stud and turn the nut clockwise with your hand until it no longer turns. This will be the point that the nylon insert contacts the top thread of the fastener.
- Place the socket that matches the nylon lock nut on the 3/8 inch drive ratchet.
- Slide the socket onto the nylon lock nut and turn the handle of the ratchet clockwise to turn the nylon lock nut onto the fastener. You will feel some resistance from the nylon lock nut as you turn it onto the fastener. This is created by the nylon insert and is completely normal.
- Continue turning the ratchet handle until the nylon lock nut seats tightly against the surface of the material you are securing with the nut.
- Inspect the nylon insert of the lock nut to ensure that it is intact after installation.
Applications
Nylon lock nuts are used across a wide variety of industries, including in appliances, computers, furniture, medical equipment, vehicles, sheet metal, and aircraft. Heavier nylon insert lock nuts are used in buildings, on bridges, and in railroad equipment.
John Sulsenti
2025-07-30 12:43:20
Nylon insert keeps nut from moving once tight or in place; like to repair a sliding lock on a pair of locking tweezers.
Nash406
2025-06-21 16:25:51
Good
Kevo
2025-06-12 12:43:55
I needed smallish screws & nuts for a prototype that I was building, and these were the perfect match. They worked perfectly for my application & the color hid the hardware well. I would definitely buy these again.
Jack
2025-05-01 10:59:51
Good quality. Well packaged
Rudy
2025-04-23 12:37:05
Holds tight and strong
lucifer
2025-04-20 13:57:44
Color was consistent
Earl Davis
2025-04-14 20:43:10
Nice price.
Tom
2025-03-05 13:51:23
If you know me, I very rarely like to screw without a locking nut. You can Google that, learn a lot about locking nut varieties.
Cameron Baker
2025-02-19 16:38:01
Correct size, thread easily
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