National Hardware N222-406 2192 Square U Bolts in Zinc, #677-3/8"x4"x7" Designed for securing various products to rectangular wood and metal objects; 3/8-Inch x4-Inch x7-Inch If plates are required use National's #2191 plates Nuts included Manufactured from steel wire Manufactured from stainless steel Manufactured from steel wire Designed for securing various products to rectangular wood and metal objects If plates are required use National's #2191 plates