DescriptionColorFittings AN Bulkhead Lock Nuts are precision CNC-machined to securely fasten AN bulkhead fittings through firewalls, chassis panels, fuel cells, and custom fabrication projects. Designed to provide a tight, vibration-resistant hold, these bulkhead nuts ensure proper alignment and a secure mounting surface for leak-free AN plumbing systems.Manufactured from aerospace-grade 6061-T6 billet aluminum and finished with ColorFittings’ proprietary anodizing process, these AN bulkhead nuts deliver superior strength, corrosion resistance, and long-term durability in high-heat, high-vibration racing and street performance environments.Engineered for use with ColorFittings AN Union Bulkhead Fittings, these lock nuts provide the secure clamping force needed for fuel, oil, coolant, brake, transmission, and power steering applications. Ideal for motorsport builds, off-road vehicles, marine systems, and custom engine bay fabrication.Complete your install with our matching AN Bulkheads, AN Fittings, and AN Assembly Tools for a clean, professional-grade plumbing solution built to perform.
