Direct fit for 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 Corvette C2 & C3 seat hinge assemblies, restoring proper seat back pivot motion Precision reproduction shoulder bolt and nut made to GM spec, ensuring secure, smooth movement without play Ideal restore-oriented upgrade: replace rusty, worn or missing pivot hardware to regain showroom seat feel Chrome-finished bolt resists corrosion and wears in with age—exact match for trusted restorers Sold individually Your seat hinge pivot might seem small — until worn or rusted hardware causes sloppy movement, squeaks, or misalignment. This pivot bolt and nut restores that precision you expect from a Corvette interior. Whether you're doing a full restoration or just replacing fatigued parts, this is one of those hidden details that separates a “good enough” job from a true Corvette restoration. In the world of Corvette restoration, it’s the small parts that tell the biggest stories. This seat hinge pivot bolt (GM 3863372 / 342156) with nut, is one of those often-overlooked components that plays a critical role in how your seat feels and behaves. It fits C2 and C3 models from 1963 through 1973, replacing old, corroded, or missing hardware. Designed to match original specifications in shoulder diameter, thread length, and finish, it's precision manufactured so your seat rails articulate properly, with none of the slack or rattles that plague aging bolts. Each bolt comes with the nut to finish the assembly, so you’ve got everything needed per pivot point. Use it during seat reassembly, interior restoration, or whenever you're chasing that perfect detail that concours judges love.