Radium Direct Mount Fill Neck And Cap, Vented

Radium Direct Mount Fill Neck and Cap — Vented

The Radium Engineering 20-0197-V Direct Mount Fill Neck and Cap is designed for filling directly into a fuel cell, providing a clean and simple fuelling solution for any cell using a 6-bolt, 2.18" (55mm) bolt circle mounting flange — the standard pattern used on all Radium Engineering Fuel Cell Surge Tanks. Screw threads are the industry-standard 1/4"-28.

This kit uses the 20-0148-V vented fill neck cap (included) for quick and simple filling. The vented design allows air to escape during filling, preventing pressure build-up in the cell. All sealing is handled by Viton gaskets and O-rings for full E85 and fuel compatibility.

Suits: Any fuel cell with a 6-bolt, 2.18" (55mm) bolt circle mounting flange — including all Radium Engineering Fuel Cell Surge Tanks

Kit Includes:

• 1x Machined and anodized aluminium fill neck
• 1x Anodized and laser-etched aluminium cap (20-0148-V, vented)
• 1x Viton gasket flange seal
• 1x Viton O-ring cap seal
• Stainless steel hardware

Specifications:

• Mounting flange: 6-bolt, 2.18" (55mm) bolt circle
• Thread standard: 1/4"-28
• Cap type: Vented (20-0148-V)
• Sealing: Viton gasket and O-ring
• Finish: Machined anodized aluminium, laser-etched cap

Available Part Numbers:

• 20-0197-V — Direct Mount Fill Neck and Cap, Vented

Why Radium Engineering?

• ✅ Manufactured in the USA to motorsport-grade tolerances
• ✅ Machined anodized aluminium with laser-etched cap and Viton sealing for long-term durability
• ✅ Trusted by tuners and race teams running high-power fuel cell builds worldwide
• ✅ Vented cap design prevents pressure build-up during filling for fast, safe fuelling
• ✅ Compatible with E85, ethanol, methanol, pump petrol, and flex fuel sensor integration