The 1964-1981 GM Car 12-Bolt Differential Cover Screws are precision hardware replacements designed to secure the rear axle cover on GM vehicles equipped with a 12-bolt rear differential. Featuring the correct thread pitch, length, and head style, these screws offer a factory-correct fit and appearance. Made from durable steel with a corrosion-resistant finish, they help create a tight seal between the differential cover and housing—critical for preventing fluid leaks and ensuring long-term axle reliability. Ideal for gear service, gasket replacement, or concours restorations.
Installation:
Difficulty: 2/5 – Basic mechanical skills and tools required.
Instructions: Drain the differential fluid and remove the old cover screws. Clean the gasket surface and install a new gasket or RTV sealant as needed. Position the differential cover and install the new screws in a crisscross pattern. Tighten evenly to factory torque specs to ensure a proper seal. Refill with the correct differential fluid.
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| Make | Model | Years |
| Chevrolet | Chevelle | 1964 - 1972 |
| Chevrolet | El Camino | 1964 - 1972 |
| Chevrolet | Malibu | 1964 - 1967 |
| Pontiac | GTO | 1971 - 1972 |
