... , Heavy Hex Bolts, Hex Cap Screws , Stud Bolts, Full Thread Rods, etc.Nuts: Hex Nuts, Heavy Hex Nuts, Square Nuts ... , etc.Washers: Flate Washers, Ball Washers, etc. Specifications:1.Main Size: 1/2"~4" ; 2 ... ,iron,alloy steel;4.Surface finishes: Black ,zinc-plated,plain,etc. ;5.Usage: steel structures,such as multi-floor&high-rise ...