Radium Engineering 20-0155 Fuel Cell Mounting Tab

The Radium Engineering Fuel Cell Mounting Tab Kit is a precision-engineered, universal mounting solution designed to secure fuel cells with a standard 6-inch by 10-inch 24-bolt fill plate to Radium Engineering legacy FCST (Fuel Cell Support Tray) assemblies. Manufactured in Clackamas, Oregon, USA, this kit uses a 12-bolt attachment design that clamps directly onto the existing fill plate, distributing load evenly across the cell without requiring additional drilling or custom fabrication. Whether you are building a new motorsport fuel system or upgrading an existing Radium FCST assembly, this kit provides a clean, reliable, and repeatable mounting solution.

Why the 12-Bolt Design Outperforms Older Mounting Methods

Traditional fuel cell mounting strategies often rely on 4 or 6 discrete attachment points, concentrating stress at a small number of locations on the fill plate perimeter. Under race conditions, vibration, hard cornering, and fuel load shifts can fatigue the fill plate at those stress concentrations over time. The Radium Engineering mounting tab kit addresses this by spreading clamping force across 12 of the 24 fill plate bolts, roughly doubling the number of load-bearing points compared to a 6-bolt approach and tripling those of a 4-bolt bracket. This larger contact footprint reduces peak stress at any single bolt location, improves vibration resistance, and keeps the fuel cell seated firmly without distorting the fill plate flange. The result is a more durable, longer-lasting installation that requires less periodic re-torquing.

Material and Construction

The mounting tabs are laser cut from 5052 aluminum sheet, a marine-grade alloy chosen for its excellent corrosion resistance, good formability, and high fatigue strength relative to its weight. After cutting, each tab is thoroughly deburred to remove any sharp edges left by the laser process, then finished with a black anodize coating. Anodizing integrates into the aluminum surface rather than sitting on top of it, producing a finish that resists chipping, peeling, and chemical attack from fuel vapors, brake fluid splash, and chassis cleaning solvents. The two-piece tab design allows the assembly to bridge the fill plate without requiring a single large stamping, keeping part weight low and material utilization high.

Sealing integrity at every bolt location is handled by the included 36 black nylon sealing washers. Nylon washers prevent direct metal-to-metal contact between aluminum hardware and the fill plate, reducing galvanic interaction and providing a compliant seating surface that maintains consistent clamp load as temperatures cycle. Twenty-four washers are sized for the fill plate bolts and 12 are designated for the mounting tab bolts themselves.

Compatibility

This kit is compatible with any fuel cell that uses a standard 6-inch by 10-inch 24-bolt fill plate, including cells from the following manufacturers:

• FuelSafe
• ATL
• Jaz Products
• Harmon
• Pyrotect

Radium FCST compatibility is limited to legacy models only. This kit is designed for and compatible with Radium Engineering FCST assemblies in the 20-014X-XX and 20-049X-XX series. It is also suitable as a direct replacement or upgrade for those existing FCST assemblies.

Important: This kit is not compatible with the Radium FCST-X next-generation series. If you own an FCST-X assembly, please contact Radium Engineering to confirm the correct mounting hardware for your application.

What's Included

• 2-piece mounting tabs, laser cut 5052 aluminum, deburred, anodized black
• 36 black nylon sealing washers (24 for fill plate bolts, 12 for mounting tab bolts)

Full Specifications

Warranty Information

This product is covered by a 1-Year Limited Warranty against defects in materials and workmanship from the date of purchase. The warranty is non-transferable and applies to the original purchaser only. It does not cover damage resulting from misuse, improper installation, racing or competition use beyond normal wear, or modifications not approved by Radium Engineering. To request warranty service or obtain an RMA number, contact Radium Engineering directly with your proof of purchase and a description of the issue.

Related Radium Engineering Accessories

Complete your fuel cell installation with these compatible Radium Engineering components:

• 18-0015 Fuel Cell Gasket 6x10 24-Bolt - A precision-cut gasket for the standard 6-inch by 10-inch 24-bolt fill plate interface. Provides a proper seal between the fill plate and fuel cell body, preventing fuel vapor migration.
• 20-0278 Fuel Cell Weld Flange Raw Aluminum - A raw aluminum weld flange designed for custom fuel system fabrication. Pairs with Radium FCST assemblies for chassis integration work.
• 14-0584 Fuel Cell Nut Ring Black Anodized - A black anodized nut ring for securing fill plate hardware. Matches the finish of these mounting tabs for a clean, uniform appearance.

California Proposition 65 Warning

WARNING: This product can expose you to chemicals including aluminum compounds and anodizing process byproducts, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Frequently Asked Questions

What fuel cells is the 20-0155 compatible with?
This kit is compatible with any fuel cell that uses a standard 6-inch by 10-inch 24-bolt fill plate. This includes cells from FuelSafe, ATL, Jaz Products, Harmon, and Pyrotect, among others that share the same fill plate bolt pattern.

Which Radium FCST models work with this fuel cell mounting tab kit?
This kit is designed for Radium Engineering legacy FCST assemblies in the 20-014X-XX and 20-049X-XX product series. It is not compatible with the Radium FCST-X next-generation series. If you are unsure which FCST you own, check the part number on your assembly against those series designations.

How many bolts does the 20-0155 use to attach to the fill plate?
The kit attaches using 12 of the 24 available fill plate bolts. This 12-bolt design spreads the mounting load evenly around the fill plate perimeter, reducing stress concentration compared to 4-bolt or 6-bolt mounting approaches.

Do I need to drill any holes to install these mounting tabs?
No additional drilling is required. The tabs clamp onto the existing fill plate bolt pattern, using 12 of the 24 standard fill plate bolts as attachment points. No modification to the fuel cell or chassis is necessary for a standard installation.

What are the sealing washers for, and how many are included?
The 36 included black nylon sealing washers serve two purposes: 24 of them seat against the fill plate bolts to provide a compliant, non-metallic bearing surface that maintains consistent clamp load and reduces galvanic contact between aluminum parts; the remaining 12 are used at the mounting tab bolt locations for the same reason.

Can this kit serve as a direct replacement for worn or damaged mounting tabs on an existing FCST assembly?
Yes. This kit is suitable as a direct replacement for mounting tabs on any compatible Radium Engineering legacy FCST assembly (20-014X-XX and 20-049X-XX series), as well as for use as an upgrade on assemblies that did not originally include dedicated mounting tabs.

What related parts should I order alongside this fuel cell mounting tab kit?
For a complete installation, consider adding the 18-0015 Fuel Cell Gasket 6x10 24-Bolt to seal the fill plate interface, the 20-0278 Fuel Cell Weld Flange Raw Aluminum for chassis integration, and the 14-0584 Fuel Cell Nut Ring Black Anodized to complete the fill plate hardware stack.

Where is this fuel cell mounting tab kit manufactured?
This product is manufactured in Clackamas, Oregon, USA by Radium Engineering. The mounting tabs are laser cut, deburred, and anodized domestically.

What warranty does this product carry?
This product is covered by a 1-Year Limited Warranty against defects in materials and workmanship. The warranty is non-transferable. For warranty service or RMA requests, contact Radium Engineering at info@radiumauto.com with proof of purchase.