Part # Commodity 50FNCS 1/2-20 CASTLE NUT 37CNNLZ 3/8-16 NYLON INSERT LOCKNUT ZINC PLTD 31CNNLZ 5/16-18 NYLON INSERT LOCKNUT ZINC PLTD 50CNNLI/GR-C 1/2-13 NYLON INS L/N IFI 100/107 GR C (USE WITH GR 50CNNLZ 1/2-13 NYLON INSERT LOCKNUT ZINC PLTD 9763-22303-4-T-F-3-3500 1/4-20 NYLON INSERT L/N ASTM F1941-10 FE/ZN 5AT 96 HR SALT SPRAY 9763-22303-4-F-3-3500 1/4-20 NYLON INSERT L/N CLR ZINC ROHS 96 HR SALT SPRAY 9763-22303-4-F-3-3500 1/4-20 NYLON INSERT L/N CLR ZINC ROHS 96 HR SALT SPRAY 25CNNL8 1/4-20 NYLON INSERT LOCKNUT 18-8 S/S 25CNNLZ 1/4-20 NYLON INSERT LOCKNUT ZINC PLTD 62CNNLZ 5/8-11 NYLON INSERT LOCKNUT ZINC PLTD