Nylon Insert Lock Nuts 18-8 Stainless Steel. (20) 4-40, (20) 6-32, (15) 10-24, (10) 1/4-20, (5) 3/8-16, (2) 1/2-13, (20) 5-40, (15) 8-32, (15) 10-32, (10) 5/16-18, (5) 7/16-14, (2) 5/8-11.<br><br>
Nylon Insert Lock Nuts Zinc Plated. (25) 4-40", (25) 6-32", (25) 10-32", (15) 1/4-20", (10) 3/8-16", (5) 1/2-13", (25) 5-40", (25) 8-32", (25) 10-32", (15) 5/16-18", (10) 7/16-14", (5) 5/8-11".<br><br>