Positive Seal- 1/8in NPT Fitting

The MOROSO Positive Seal 1/8in NPT Fitting (Part No. 22632) is a precision aluminum bulkhead connector engineered for high-pressure fluid systems requiring reliable O-ring sealed connections. This black anodized fitting serves as a critical interface point in engine compartments, fuel systems, cooling loops, and custom plumbing installations where leak-free performance is non-negotiable. The 1/8 inch NPT female thread provides a standard industrial connection point compatible with industry-standard fluid lines and adapters.

The positive seal design uses a beveled O-ring geometry that creates a dual contact point—both on the tapered NPT thread and against the bulkhead shoulder—to eliminate common leak paths found in single-seal designs. Aluminum construction offers excellent corrosion resistance and a favorable strength-to-weight ratio for engine bay applications. The black anodized finish provides additional oxidation resistance while maintaining a professional appearance. At just 0.09 lbs, this compact fitting integrates into tight engine compartments without adding significant weight. The NPT female configuration allows direct connection of 1/8 inch NPT male adapters, fittings, and sensors, making it ideal for fuel pressure gauges, coolant bypass ports, catch can vents, and boost reference lines.

This fitting is engineered for domestic hot rod, street machine, and performance engine builders who demand reliability in custom cooling and fuel system designs. OEM technicians also rely on MOROSO fittings as replacement components in high-vibration environments. The O-ring seal mechanism requires no PTFE tape or paste—simply insert the male adapter and tighten, making installation straightforward even in confined spaces. Mechanics familiar with NPT threading will recognize this as a drop-in solution for leak-prone factory connection points.