Product Overview The M10 M12 M14 M16 Grade 12.9 Black Oxide Galvanized Hex Bolt Kit with Nuts and Washers is engineered for heavy-duty steel structure construction. Supplied by Weichai Fasteners & Small Parts, this kit is designed as a reliable spare part solution for Weichai heavy-duty truck engines and is available from China. Key Specifications Thread Sizes M10, M12, M14, M16 Property Class Grade 12.9 Finish Options Black Oxide / Galvanized Kit Contents Hex bolts, matching