FNE050013053 - BULK CUTTING EDGE 1/2-13 NYLON LOCK NUTOne New Aftermarket Replacement 1 2" 13 Nylon Lock Nut for Snow Plow Cutting Edges This bulk 1 2" 13 nylon lock nut is a standard replacement fastener used to secure cutting edges to snow plow blades. The nylon insert locks the nut in place against vibration, making it the preferred hardware for cutting edge mounting applications where loosening under load is a concern. Sold in bulk quantity. Specifications Thread Size: 1 2" 13 (UNC coarse thread)