Automotive hardware encompasses non-functional, mechanically fastening components used throughout vehicle assembly. This category includes bolts, nuts, screws, washers, clips, and retaining rings, securing static components like body panels, engine accessories, and interior trim. Hardware is manufactured to precise dimensional tolerances and strength grades, specified by material composition – commonly steel, stainless steel, or alloy – and coating for corrosion resistance. Fastener thread types adhere to standardized pitches (UNC, UNF, metric fine/coarse) and head styles are application-specific for torque application and accessibility. Variations include self-locking features, flange designs, and specialized coatings to prevent seizing or galvanic corrosion.