U-bolts stainless steel - with nuts assembled boxed - 5/16 inch diameter thread stainless steel - 2-1/2 inch width length 5 inches. #546, stainless steel, u-bolt, for marine and other outdoor applications, resistant to atmospheric corrosion, passivated for superior corrosion resistance, non-magnetic, bulk. For use in exterior and interior applications. Stainless Steel resists rust. With straps assembled.