#3 Bulkhead Nut #3 Steel

The #3 Bulkhead Nut #3 Steel from EARLS is a precision hydraulic fitting component engineered for aircraft, automotive, and industrial fluid line assemblies. This steel bulkhead nut is designed to secure AN-style hose and tube connections at bulkhead penetrations, where space constraints and vibration resistance are critical. Professionals in high-performance racing, aviation, and custom hydraulic systems rely on this component to maintain leak-free connections under extreme pressure and temperature fluctuations.

Manufactured in steel with nickel plating, this #3 AN bulkhead nut delivers corrosion resistance and exceptional durability in demanding environments. The nickel-plated finish protects against rust while maintaining excellent thread integrity across repeated installation and removal cycles. Its compact design—measuring 2.35 inches in length with a 0.3-inch profile—enables seamless integration into confined mounting areas without compromising structural support or fitting accessibility. The steel construction ensures reliable performance under the high-pressure demands of fuel systems, coolant circuits, and brake line applications where aluminum alternatives may prove insufficient.

This bulkhead nut is ideal for technicians, fabricators, and system builders who demand OEM-quality fittings for aircraft restoration, motorsport hydraulic systems, or precision industrial applications. The pair configuration allows for dual-circuit installations or inventory backup, reducing downtime on complex projects. Compatible with standard AN bulkhead fitting stacks, this component integrates seamlessly into existing SAE J518 and AN/MS fluid line standards, making it essential for anyone assembling or servicing high-reliability hydraulic systems.