1.0″/25mm Billet Aluminum NON-vented Cap with Weld on Bung Coolant Fuel Oil Tank

Designed for superior durability and performance, this CNC Billet Aluminum Weld-On Flange with Cap is the exact component we trust in our fuel tanks, expansion tanks, and other non-vented applications. After struggling to source high-quality parts, we partnered directly with a CNC machining company to create our own precision-machined neck and cap. Crafted from solid 6061 billet aluminum, this flange and cap set offers exceptional strength, corrosion resistance, and a professional anodized finish. Unlike lower-quality alternatives, our weld flanges are free from coatings, ensuring a clean and reliable weld every time. Key Features: Premium 6061 Billet Aluminum – Strong, lightweight, and corrosion-resistant. Precision CNC Machining – Ensures a perfect fit and high-quality finish. Raw Aluminum Finish – No coatings, making welding easy and reliable. Ideal for Non-Vented Applications – Designed for fuel tanks, expansion tanks, and more. Specifications: Brand: Straightboost Performance Cap Material: 6061 Aluminum Flange Material: 6061 Aluminum Cap Finish: Anodized Black Weld-On Flange OD: 37mm | 1.45″ Weld-On Flange ID: 23mm | 0.90″ Required Hole Size for Weld Flange Step: 33mm |1.29″ Assembled Overall Height: 28mm | 1.10″ Cap OD: 44mm | 1.73″ Thread: 1″-12 UNF – 2A Complete Assembly Weight: 2.8 oz (80g) What’s Included: 1x Weld-On Flange 1x Billet Cap 1x O-Ring Note: During welding, we strongly recommend installing the cap in the flange and applying a lubricant (such as motor oil) to the threads. This helps prevent thread distortion during the welding process. Perfect for custom fabrication, racing, and performance applications, this CNC Billet Aluminum Weld-On Flange with Cap is a high-quality, no-compromise solution for professionals and enthusiasts alike.