An irregularlyshaped thread at the top of the nut grips the bolt for a stronger hold than nylon-insertlocknuts.They thread on from the bottom of thenut,allowing more threads to engage the bolt before tightening for easier installation than center-lock distorted threadlocknuts.The strength of the bolt should match the strength of the nut to prevent damagingthreads.They'renotreusable.Comparable in strength to Class8.8bolts,they'resuitable for fastening most machinery andequipment.A Zinc-plated steel provides corrosion resistance in wetenvironments.