Crown Bolt 85600 1/2 Inch-13 x 3/4 Inch Zinc-Plated Coarse Thread Grade 5 Cap Screws, 25-Count Zinc-plated 1/2 inch-13 x 3/4 inch cap screws grade 5 For general applications 1/2 inch-13 body diameter and thread pitch 3/4-inch fastener length Coarse thread