Castle Nut UNF Black by Allfast Solutions SKU NUH14FCA 1/4 / 100 5/16 / 100 3/8 / 100 7/16 / 100 1/2 / 100 9/16 / 100 5/8 / 50 3/4 / 50 7/8 / 50 1" / 50 1 1/4 / 25 1 3/8 / 25 1 1/2 / 10 1 3/4 / 10 2" / 5 Diameter 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1" 1 1/4 1 3/8 1 1/2 1 3/4 2" Pack Size 100 50 25 10 5 Quantity/Each Add to order