Nylon Insert Lock Nut - 1/2-13 - NE - Low Carbon Steel - Zinc CR+3 - UNC - Pkg of 100 - BBI 305172

NYLON LOCK NUTS CONTAIN A NYLON COLLAR INSERT TO HELP PREVENT TURNING. THE INSERT DEFORMS ELASTICALLY OVER SCREW THREADS. THE NYLON INSERT APPLIES A COMPRESSIVE FORCE AGAINST THE SCREW TO LOCK THE NUT.