Crown Bolt 85880 1/2 Inch-13 x 4-1/2 Inch Yellow Zinc-Plated Coarse Thread Grade 8 Cap Screws, 10-Count Yellow Zinc-plated 1/2 inch-13 x 4-1/2 inch cap screws grade 8 For general applications 1/2 inch-13 body diameter and thread pitch 4-1/2-inch fastener length Grade 8