Product Details

The Hillman Zinc-Plated Nylon Insert Stop Nut is a hexagonal nut used with bolts and washers of the same material, finish and grade.

• Nylon ring creates rotational resistance when displaced by a mating male threaded fastener, thus preventing loosening
• Nylon insert also helps resist vibration and adds extra corrosion resistance
• 1/4 in. -20 size