Medium-Strength Steel Nylon-Insert Locknut, Grade 5, Zinc-Plated, 5/16"-18 Thread Size
A nylon insert grips the bolt to resist loosening without damaging threads.
These locknuts are reusable, but their holding power lessens with each use.
They are suitable for fastening most vehicle, machinery and equipment.
A zinc plating provides corrosion resistance in wet environments.
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