National Hardware N222-133 2190 U Bolts in Zinc, #516-5/16"x1-3/8"x3-3/4" Manufactured from steel wire Designed for fastening products to pipe, wood, etc Suitable for automotive, plumbing and other home and industrial applications LifeSpan Limited Lifetime Warranty Plate and nuts included Manufactured from steel wire Designed for fastening products to pipe, wood, etc Suitable for automotive, plumbing and other home and industrial applications