6AN Bulkhead Nuts Aluminum Blue 2/pkg

The REDHORSE PERFORMANCE 6AN Bulkhead Nuts in aluminum blue anodized finish represent a precision hydraulic or fuel system component designed for custom automotive, motorsport, and performance applications. Supplied as a pair, these 6 AN bulkhead nuts enable reliable threaded connections at bulkhead fittings, a critical interface in pressurized fluid systems where vibration, temperature cycling, and corrosive environments demand both strength and chemical resistance.

Constructed from aluminum, these bulkhead fitting nuts deliver a lightweight alternative to steel while maintaining adequate tensile strength for moderate-pressure hydraulic and fuel line applications. The blue anodized finish provides corrosion protection in moisture-rich or salt-air environments, a practical advantage for marine engine swaps, off-road vehicles, and high-performance street cars where standard fasteners degrade rapidly. The 6 AN size corresponds to a 3/8-inch female thread, the industry-standard connection size for mid-flow applications in custom fuel injection, turbo cooling systems, and transmission cooler lines. Each pair includes matching nut geometry to ensure balanced assembly and repeatable torque specifications across dual-line setups.

These nuts are specified by engine builders, fabricators, and hobbyists assembling custom hydraulic or fuel system networks where OEM bulkhead solutions do not fit the application envelope. Common uses include LS engine fuel rail conversions, custom turbo intercooler circuits, and vintage vehicle modernization where period-correct fittings must be replaced with modern-spec components. REDHORSE Performance specializes in AN fitting systems, making this a reliable choice for builders who prioritize fit and finish consistency across their complete fuel or hydraulic architecture.