Non Locking Check Nuts are thinner than a standard Check Nut but have the same dimension across the flats and corners. Non Locking Check Nuts have two common applications. A Non Locking Nut can be threaded onto a bolt and run tight against the standard nut which will lock the nut in place and prevent it from backing off. Non Locking Nuts are sometimes used for leveling purposes as well. Since hot-dip galvanizing typically adds 2.2 to 5 mils of thickness to the threaded portion of a fastener, galvanized Non Locking Nuts are tapped oversize to compensate for the corrosion resistant coating on the bolts. We manufacture Non Locking check Nuts according to user’s specification.