1、Usage: Hexagonal head bolt washer and nut kit can perfectly fasten connecting parts. Easy to install, most suitable for parts with frequent assembly and disassembly. 2、Function: Nuts and flat washers expand the contact area and reduce pressure to protect bolts and parts. 3、High Quality: The compact and uniform bolt thread is not easy to deform and slide during rolling and installation. 4、304 Stainless Steel: Using high quality 304 stainless steel, high strength, can be used in harsh environments such as high temperature, cold weather, and high humidity. 5、Advantage: Screws nuts washer kit has superior rust resistance and excellent oxidation resistance, which can ensure long term use.