Nyloc Nut - Nylon Insert Lock Nuts

Nyloc nuts, also referred to as a nylon insert lock nut, polymer-insert lock nut, or nylon insert (elastic) stop nut, is a common type of locknut comprised of a hex nut with a fixed nylon-filled collar at its back end. They are designed to be used with machine screws and bolts and are reusable. 

Frequently Asked Questions About Nyloc Nuts

What are Nyloc nuts used for? 

Nyloc nuts are used in applications where preventing loosening is a high priority, such as automotive, industrial, or machinery equipment. 

How does a Nyloc nut work? 

When a screw reaches the nylon-filled collar, the threads and nylon form a tight, frictional fit, thus restricting the movement of the screw when it is subject to vibration. 

What are the different types of Nyloc nuts?

Nyloc nuts are available in several different series/types, including:
·    NE (light hex, standard height)
·    NTE (light hex, thin height)
·    NTU (heavy hex, thin height)
·    NU (heavy hex, full height)
·    NM (machine screw pattern, standard height)
·    NTM (machine screw pattern/thin/jam height)

What sizes do Nyloc nuts come in?

AFT offers Nyloc nuts in both imperial and metric sizing. Diameter-thread sizes range from #2-56 to 3”-4 or M2.5-0.45 to M48-5.00. 

What materials and finishes are Nyloc nuts available in? 

Nyloc nuts are available in a myriad of materials and finishes. They are made of steel, stainless steel, or brass. Available finishes include black oxide, chrome, phosphate and oil, plain, teflon wax, wax, zinc, zinc Cr+3, zinc JS500, and zinc yellow. Choosing a stainless steel Nyloc nut or a zinc finish offers additional corrosion resistance.