Hexagonal Nut Nylon Insert Zinc 9/16-12 Grade 2

These locknuts have a nylon insert that grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use. About half the strength of medium-strength steel locknuts,they're for light duty fastening applications, such as securing access panels.

White Nylon locknuts are corrosion resistant in wet environments.