Lock nut, also referred to as a nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut, is a kind of locknut with a nylon collar insert that resists turning.
The plastic insert is placed at the end of the nut, with an inner diameter (ID) slightly smaller than the major diameter of the screw. The insert deforms elastically over the threads of the screw, without having threads in turn cut into it. The nylon insert locks the nut by friction against the screw under the applied radial compressive force. Nyloc nuts retain their locking ability up to 250 °F (121 °C)
A nyloc nut, also referred to as a nylon-insert lock nut, polymer-insert lock nut, or elastic stop nut, is a kind of locknut with a nylon collar insert that resists turning.
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.
The plastic insert is placed at the end of the nut, with an inner diameter (ID) slightly smaller than the major diameter of the screw. The insert deforms elastically over the threads of the screw, without having threads in turn cut into it.
The nylon insert locks the nut by friction against the screw under the applied radial compressive force. Nyloc nuts retain their locking ability up to 250 °F (121 °C).
Always fix a Nylock Nut with the metal thread going on first.
Inspect the nylon insert of the lock nut to ensure that it is intact after installation.
Caution – A nylock nut should only be used once and the nylon insert no longer performs its function to 100% of design .. therefore nylock nuts should be discarded and replaced after each use.
A variety of locking nuts available in ready stock with us.
Metal Lock Nuts
All Metal lock nuts work on the principle of a slight deformation in the nut. Locking is achieved by deformation of the last thread. This is a top locking style nut.
Are also known as half-thickness nut or a split nut; these are used as a locknut or jam nut.
Often used in pairs or in conjunction with a hexagon full nut in a locking arrangement.
- Standards : DIN 439, ISO 4035
- Materials: Mild Steel and Stainless Steel – AISI-304 and AISI-316
The thin nut must be put in place first and the full nut after that.
The thin lock nut should be used first and tightened to between 25% to 50% of the overall required torque.
The thin nut is then held in place while the second thicker nut is then installed and tightened to full torque.
consists of a nut in a spring steel cage which wraps around the nut. The cage has two wings that when compressed allow the cage to be inserted into the square holes, for example, in the mounting rails of equipment racks. When the wings are released, they hold the nut in position behind the hole. Cage nuts conforming to this description were patented in 1952 and 1953.This design requires insertion tools to install the cage nut into the hole. Newer designs featuring a squeeze-and-release tab allow for tool-less installation
Keps nut, (also called a k-lock nut or washer nut), is a nut with an attached, free-spinning washer.
It is used to make assembly more convenient.
The locking action is achieved when the nut is tightened against a bearing surface as the teeth of the lock washer dig into it.
These nuts are made to create tension against the material when installed onto a bolt. It is important to NEVER over torque these nuts. Once you over tighten a lock nut it loses its functionality.
Keps K locks are ideal for applications where you might use an external tooth lock washer and nut but the combination is more convenient. You need to carry around fewer parts making installation much faster. They also save you from the fumbling of little lock washers that seem to be designed to fall from your hands and disappear.
Doesn’t gall screw threads.
Self-Locking Counter Nuts [PAL NUT]
Palnuts are made to DIN 7967 and most commonly referred to as counter nuts, stamped sheet metal check-nuts or self locking counter nuts. Used for axial locking.
These locknuts are made from a spring-like steel which allows them to distort under load pressure, before returning to their original shape in the threaded area.
They are very lightweight and host a low profile and the ability to be tightened with an internal wrench or fingers.
This provides a vibration resistant locking action whilst remaining usable in small and tricky areas suffering from space restrictions.