Everbilt 3/8 In.-16 X 3 In. Zinc Plated Hex Bolt 800866 - The Home Depot

These grade 307A unplated fasteners are 3/8-16 thread and are 3-1/2 in length with a 1-1/8 thread length and 9/16 square head. Thread Diameter: 3/8-16 Length: 3-1/2 Drive Type: Square Drive Size: 9/16 Finish: Plain