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 that increases friction on the screw thread.
Self locking nut reuse.
The first engaged thread of the bolt experiences an enormous amount of tension.
This results from the deformation of the nut threads.
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These nuts are designed to be used only once and should be replaced whenever they are removed and in 7 years there was some money spent on bmw self locking nuts recently i bought a book of mr.
Fastenright supply a wide range of self locking nuts for various applications.
The chart at right lists the minimum prevailing torque standards recommended by faa ac43 13 1b for reusing self locking nuts with nylon or fiber inserts.
For whatever it is worth vw uses locking nuts on the suspension that don t seem to be either nyloc or distorted threads and the claim is made that the locking mechanism is one time only.
A locking fastener is designed to resist loosening and can be externally threaded such as a screw or internally threaded like a nut.
The nylon insert is located in a tapered section located at the back of the nut.
These are found in lower temperature applications typically less than 177 c due to the polymers.
As the fastener elongates it starts to apply a compressive load to the nut.
Nuts bolts fasteners and plumbing isbn 13.
The screw thread does not cut into the nylon insert however the.
Choose from our selection of self locking hex nuts including over 1 600 products in a wide range of styles and sizes.
They are able to be reused but only if the prevailing torque meets certain specifications.
In this section we ll look at some of the more common non permanent locking schemes an example of permanent locking uses a chemical reaction to form an adhesive that bonds with the mating threads.
To ensure that the corrosion proofing on the nut is in good condition.
The advisory circular also contains guidelines.
Forensic investigation strongly suggests these problems were exacerbated by self locking nuts that failed to remain locked after repeated reuse.
Resistant to vibration torque available in stainless steel and other finishes.
Upon reuse a nut and bolt combination will require an increased torque value to reach the desired clamp load.
Do not reuse self locking nuts.
Nylon lock nuts differ from a standard hex nut in that they have a nylon insert secured within the nut.
Lock nuts with a nylon insert are perhaps the most reliable lock nut as it is only limited by the temperature of the application it has been used in.
