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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.
Jeff Chapko
2025-07-31 10:08:35
Good value and worked well
Customer
2025-07-27 18:50:16
Seemed to be good quality.
Peter
2025-07-02 10:11:01
I got these screws when I was shorted on a Chinese made product that I had to assemble. These nuts work great.
Mrs. Big C
2025-06-27 14:39:07
I am so tired of looking up a product at a local store and it says ' not available in store' when I can order from Amazon and get it usually in 2 days AND cheaper! That is the situation with these. I needed the now, not next week; these are great quality and price points!
Pancake Robot
2025-06-14 17:42:41
4 out of 5 because it is not as beefy as previous purchases
jtschi1
2025-04-24 10:51:08
Just what I needed
Customer
2025-04-04 15:41:59
They did what they were designed for.
Lawrence R. Wright
2025-03-11 10:54:53
The correct size to mount old Weinmann and Universal bicycle brakes when the original one loose their Unlock capability. Nice finish too.
flevass2
2025-03-10 14:39:21
Tres pratique
Dan Gojs
2025-02-03 14:55:57
Use them and they works fine for now! Fast delivery!
DB
2025-01-15 09:51:23
Made my repairs quick and easy
Nova Scotia
2024-12-27 14:42:26
Great product for good price
BK
2024-12-21 16:32:45
A product as described.
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