Key Features;Designed for fastening products to pipe wood and more;When subjected to 312 hr of salt fog spray testing zinc-plated hardware showed severe corrosion while hardware with WeatherGuard protection withstood these harsh conditions with very little deterioration;U-bolts steel - with nuts assembled zinc plated - 5/16 inches diameter thread bulk pack width x length 1-3/8 inch x 3-3/4 For use in exterior and interior applications. Steel resists rust. With straps assembled.For use in exterior and interior applications. Steel resists rust. With straps assembled. For use in exterior and interior applications. Steel resists rust. Plate and nut included.