Nylon Insert / Top Lock Self Locking Nuts Rockford

Our Grade 5 Top Locknut Allows Nut to be Threaded All the Way On the Bolt Before Wrenching is Required. All Metal One Piece Construction Withstands Severe Vibration and Shock Loads. Use in Place of Nylon Insert Nuts for Applications Over 250 Degrees. Manufactured to Meet or Exceed O.E.M. SPecifications in Function, Form & Fit.