Aluminum Alloy Weld On Oil Tank Filler Neck With Cap, 1.5 Inch OD

Engineered from high-quality aviation aluminum, this Aluminum Alloy Weld On Oil Tank Filler Neck with Cap is designed for durable, reliable fuel and liquid tank filling. The 1.5" nominal neck diameter provides a robust weld-on connection and precise tolerances for a snug, leak-free fit.

It includes an O-shaped sealing ring and a natural aluminum screw-on cap, delivering a secure seal to minimize spills, evaporation, and exposure to contaminants. The smooth finished design resists corrosion and stands up to harsh operating conditions, making it a dependable choice for custom builds and repairs alike.

Key dimensions help ensure a proper fit: Cap diameter about 54mm (2.1"), cap height 15mm, overall height 56mm. Hole diameter 38mm (1.5"). Neck external diameter 44.5mm (1.8"), with a stepped neck and M48 x 2.5 threads on both neck and cap. The unit weighs approximately 95g, combining strength with lightweight handling for easy fabrication and installation.

Suitable for collecting oil tanks, filling oil tanks, water tanks, and dry oil tanks, this filler neck is versatile enough for a range of liquid containment applications. The design meets aviation hose fitting requirements with precision machine tolerances, ensuring reliable performance in demanding environments.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

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Benefits & Tips

• Leak-free operation: the included O-ring and correctly threaded cap provide a reliable seal that minimizes spills during filling and transport.
• Wide compatibility: ideal for integration into fuel tanks, water tanks, or dry oil tanks where a robust welded filler neck is required.
• Easy retrofit: the standardized M48 x 2.5 threads on neck and cap simplify replacement or upgrades on compatible systems.

Product specifications

• Material: Aluminium alloy (aviation-grade)
• Cap diameter: 54mm (2.1in)
• Cap height: 15mm (0.6in)
• Overall height: 56mm (2.2in)
• Hole diameter: 38mm (1.5in)
• Neck external diameter: 44.5mm (1.8in)
• Neck thread: M48 x 2.5
• Cap thread: M48 x 2.5
• Weight: ~95g
• Package: 1 x Filler Neck with Cap

Package includes:

• 1 x Filler Neck with Cap

Warnings/Reminders

• Ensure compatibility with your tank’s hole diameter (38mm / 1.5in) before installation.
• Welding and fitting should be performed by a qualified technician to ensure proper sealing and safety.
• Use the O-ring and cap threads correctly to maintain a tight seal and prevent leaks.