Includes sizes: 6-32, 8-32, 10-24, 10-32, 1/4-20, 5/16-18, 3/8-16 & 1/2-13 High resistance to rust and other corrosion All Marine Bolt Supply kits are durable and reliable. This acorn nut assortment kit includes 8 different sizes of type 18-8 stainless steel acorn/cap nuts. The sizes included are 6-32, 8-32, 10-24, 10-32, 1/4-20, 5/16-18, 3/8-16 & 1/2-13. A total of 75 quality stainless acorn/cap nuts all neatly stored in a durable (7"x4"x1-1/2") Tuff-Tainer storage box.