Thin Hexagonal Nut Nylon Insert Zinc 5/16-18 Grade 5

These locknuts are about half the height of standard nylon-insert locknuts. Use them in light duty low-clearance applications or jam one against a hex nut to hold it in place. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use.

White Nylon locknuts resist corrosion in wet environments.