Superior Resistance to Rust & Corrosion When Compared to Common Stainless Kits Professional & Dependable Top Quality Type 316 Stainless Steel Hex Nut Assortment Kit Includes Only Top Grade, Type 316 Stainless Steel Hex Nuts & Machine Nuts This hex nut assortment kit includes 9 different sizes of type 316 stainless steel threaded hex nuts. The sizes included are 4-40, 6-32, 8-32, 10-24, 10-32, 1/4-20, 5/16-18, 3/8-16 & 1/2-13. A total of 180 top grade stainless nuts all neatly stored in a durable (7"x4"x1-1/2") Tuff-Tainer storage box. Also every kit includes a valuable, custom made Marine Bolt Supply refrigerator magnet.