-12an Replacement Port Fittings

The Moroso -12AN Replacement Port Fittings are straight-threaded AN adapter fittings designed to connect two 12 AN male ports in a single assembly. Manufactured from aluminum with black anodized finish, this pair of fittings delivers corrosion resistance and reliable sealing for high-pressure hydraulic and pneumatic systems. The o-ring interface ensures leak-free operation in demanding applications where precision port connections are critical.

These 12 AN male-to-male adapters feature o-ring seal design, which provides superior sealing performance compared to bare-threaded connections. The black anodized aluminum construction resists oxidation and corrosion while maintaining a professional appearance. With a compact footprint (3.7 x 1.55 x 4.9 inches) and lightweight design (0.16 lbs per pair), these fittings integrate seamlessly into vacuum pump installations, engine bay plumbing, and modular fluid systems without adding bulk or weight.

Vacuum pump installations—particularly in street rod and performance engine builds—require robust port connections that maintain system integrity under cycling pressure. These Moroso replacement fittings serve as direct replacements for original equipment or as upgrade components when reconfiguring vacuum lines. The AN standard threading ensures compatibility with any AN-threaded port or hose end, making these adapters essential for builders restoring vacuum systems or modifying brake booster, canister, and emission control routing.

Moroso has established itself as a trusted manufacturer of engine accessories, emission controls, and performance plumbing components for automotive enthusiasts and professional shops. The AN fitting standard—derived from military aircraft hydraulic specifications—remains the industry benchmark for leak-free, vibration-resistant connections in high-performance applications.