Vibrant AN Fitting Washer / Nut

Vibrant Performance AN Fitting Washers & Nuts

Vibrant Performance has earned a strong reputation in the performance fabrication world since its founding in 1997, and nowhere is that precision engineering more apparent than in its lineup of AN fitting washers and nuts. These small but critical components are the backbone of any reliable fluid delivery system — ensuring leak-free seals at every junction in fuel, oil, coolant, and brake line plumbing.

What Vibrant Offers in This Category

Vibrant's AN Fitting Washer and Nut lineup covers a wide range of AN sizes and hardware types, giving fabricators and enthusiasts the specific piece they need for virtually any plumbing application. The core product types include:

• Aluminum Crush Washers — Available in sizes ranging from -3AN through -16AN and sold in convenient packages of 10. These washers are designed for use with adapter fittings featuring straight threads, providing a reliable seal on ports that do not accommodate an O-ring gasket. They are fully compatible with Vibrant's own metric adapter fittings.
• Bulkhead Nuts — Engineered to secure bulkhead-style fittings through panels and firewalls, available in popular sizes like -8AN and -16AN. Constructed from lightweight 6061 aluminum alloy, they deliver strength without adding unnecessary weight to a build.
• Tube Nuts — Designed to transition hard lines to AN thread, Vibrant's tube nuts offer a practical, clean solution for builders converting steel or aluminum hard lines into AN-threaded systems. The -3AN tube nut, for example, accommodates 3/16" tubing for tight-quarters brake and fuel line work.

Why 6061 Aluminum Alloy Matters

Across the entire AN hardware lineup, Vibrant relies on 6061 aluminum alloy as the material of choice. This alloy strikes an ideal balance between corrosion resistance, machinability, and tensile strength — qualities that matter enormously in high-heat, high-vibration environments like turbocharged engines and track-day vehicles. The lightweight nature of aluminum also keeps overall system weight down, a consideration that performance builders take seriously.

Fitting Into the Broader Vibrant Ecosystem

One of the practical advantages of sourcing AN washers and nuts from Vibrant is ecosystem compatibility. Because Vibrant manufactures a comprehensive range of hose end fittings, adapters, and fluid delivery components, their hardware is engineered to work seamlessly together. Whether you are finishing a fuel system, sealing a turbo oil feed line, or building out a dry-sump setup, Vibrant's crush washers and bulkhead nuts are designed to complement their adapter fittings without guesswork about thread tolerances or sealing behavior.

For builders who demand consistent quality across every component in a build, Vibrant's attention to detail in even the smallest fasteners and sealing hardware reflects the same standards applied to their larger fabrication products. Browse the full selection of Vibrant AN fitting washers and nuts to find the exact size and hardware type your project requires.