Earl's Performance Aluminum NPT Weld Fittings

Earl's Performance Aluminum NPT Weld Fittings are professional-grade weld-in bungs engineered for fabricators and custom builders who demand reliable, leak-free threaded ports in performance fluid system applications. Machined from lightweight 6061 aluminum, these fittings are designed to be welded directly into tanks, reservoirs, pans, manifolds, and other custom-fabricated components — creating a permanent, secure NPT-threaded port in virtually any aluminum or steel structure.

Key Features:

• 6061 aluminum construction — lightweight, corrosion-resistant alloy machined to meet and exceed minimum requirements for aerospace use
• Precision NPT threads — machined to exacting tolerances for trouble-free, long-lasting, leak-free performance
• Weld-in bung design — engineered to be welded directly into custom tanks, oil pans, reservoirs, manifolds, and plumbing components
• Ideal for custom fabrication — suited for modifying or building custom tanks and fluid system components from scratch
• Bare aluminum finish — ready for custom finishing, anodizing, or powder coating to match your build aesthetic
• Broad application range — suitable for fuel systems, oil systems, coolant circuits, and other fluid management setups across automotive, racing, marine, and industrial applications
• Available in multiple NPT thread sizes — a comprehensive selection of thread configurations to cover virtually any plumbing requirement
• Made in the USA

About Earl's Performance Plumbing

Earl's Performance Plumbing has been an industry leader in high-performance fluid system components since 1955, when founder Earl Fouts began supplying aviation-grade plumbing hardware to the racing industry. Today, Earl's offers one of the most complete lines of performance plumbing products available — trusted by professional racers across drag racing, open-wheel, and road racing disciplines who rely on Earl's aerospace-inspired components season after season. These NPT weld fittings are a natural extension of that legacy, offering a dependable foundation for any custom fluid system build.