Conical Hexagonal Nut Cadium Plated 5/8-11 Grade 9

These locknuts have an irregularly shaped thread at the top of the nut that grips the bolt for a stronger hold than nylon-insert locknuts. They thread on from the bottom of the nut, allowing more threads to engage the bolt before tightening for easier installation than center-lock distorted thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. They'renot reusable. About 20%stronger than high-strength steel locknuts, they'reoften used in heavy machinery, such as earth-moving equipment. A Cadmium-Plated Steel provides corrosion resistance in wet environments and adds lubricity so they thread on smoothly.