1/4" x 1-1/2" Combo Sidewalk Bolt, Truss Head, Hurricane Hardware, Rust Resistant Stainless Steel, 100 Pack - by, LLC

1You may also like 5/16-18x2 1/2" Flat Head Trailer Floorboard Deck T40 Torx Plain-100pcs, Type F Trailer Deck Screws, Six Lobe Drive Floorboard Thread Cutting Screws$$Hardware.