Features: Precisions 8mm bolt ( 1.25x30mm) with 13mm hexagonal head and matching U nut clamp ensures secure fit for automotive body panels, chassis components, and truck accessories, offering vibrations resistant stability in harsh driving conditions. High strength carbon steel or galvanized construction delivers corrosions resistance against road salt and moisture while maintaining structural integrity through repeated tightening cycles. Essential for truck owners, mechanics, and DIYer enthusiasts requiring fastening solution during bodywork repairs, aftermarket modifications, or routine vehicle maintenance tasks. Securely fastens side skirts, mudguards, underbody protections plates, and decorative trim across various vehicle models – particularly effective for heavy duty truck accessories requiring vibrations proof connection. The 13mm standard hexagonal head enables tool compatibility with common wrenches, while the U nut's open design allows quick assembly without full disassembly – streamlining installations in tight engine bays or wheel arches spaces. Specifications: Component: Metal Screws And Nut Quantity:1,10,20 Package Includes: 1Set Car Body Fasteners note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.