3/8 MPT Pipe Nipple

The FRAGOLA 3/8 MPT Pipe Nipple (Part #491103) is a straight-through aluminum fitting adapter designed to connect two male NPT threaded ports with a consistent 3/8-inch bore. Built from aluminum and finished in blue anodize, this coupling maintains system integrity in fluid transfer, brake line, and fuel system applications where reliable threaded connections are critical.

The 3/8 NPT male-to-male configuration allows seamless integration between existing components without requiring adapters at both ends. The blue anodized aluminum construction provides corrosion resistance and reduces weight compared to steel alternatives, making it suitable for applications where system exposure to moisture or salt spray is a concern. The straight nipple design—without elbows or offsets—maintains unrestricted flow and simplifies installation in tight spaces where directional fittings would create clearance conflicts.

This fitting is commonly found in performance automotive systems, hydraulic circuits, and aftermarket fuel delivery setups where OEM port configurations require inline extensions or intermediate connections. The lightweight design and compact dimensions (6.1 inches in length, 0.75 inches in diameter) make it ideal for engine bay routing where space is limited. FRAGOLA fittings are engineered to SAE standards and suit both street and competition applications.

Buyers should verify that 3/8 NPT (National Pipe Thread) is the correct port size for their specific system before purchase, as NPT differs from other metric and fractional thread standards. The single-unit quantity means this fitting extends one connection point; multiple units may be required for systems with several extension points.