Caliper Bolts (Pair)

The HOWE Caliper Bolts (Pair), model 337B, are heavy-duty fastening components engineered for brake system assembly and maintenance on GM vehicles. These 3/8-16 thread caliper bolts measure 4.75 inches in length with a 5/8-inch hex head and built-in shoulder design, delivering the precision fit and structural integrity demanded in brake work where fastener failure is not an option.

Manufactured from steel with zinc oxide plating, these caliper bolts resist corrosion from road salt, moisture, and brake fluid exposure—critical for longevity in all-weather service. The built-in shoulder provides positive positioning during installation, eliminating guesswork and ensuring repeatable caliper alignment. The 5/8-inch hex accommodates standard socket and wrench sizes found in every shop and field kit. Supplied as a matched pair to cover both sides of a dual-piston or single-piston caliper assembly.

These fasteners are essential for brake service, restoration, and replacement work on late-model GM platforms. Technicians, restoration specialists, and serious DIY mechanics rely on OEM-spec fasteners to maintain caliper pressure, prevent micro-movement, and avoid brake fade or pull conditions caused by loose or undersized hardware. The zinc oxide finish meets automotive corrosion standards without compromising thread strength or torque specs.

Whether you're performing scheduled brake maintenance, upgrading brake components, or restoring a classic GM chassis, OEM-grade fasteners like the HOWE 337B ensure your caliper assembly stays secure under repeated thermal cycles and braking stress. Keep a pair on hand for emergency roadside repair or routine service.