The Kugel Komponents 5/16" x 3/8" Combo Double Line Clamps (6-Pack) provide a specialized, dual-line plumbing solution for high-performance builds. Designed to secure two different-sized lines running parallel along your frame rails, firewalls, or undercarriages, these clamps allow you to consolidate your routing using a single mounting point for a clean, show-quality finish.
The Ultimate Fuel System Routing Combo
The 5/16" x 3/8" staggered configuration is custom-engineered for modern, high-volume fuel delivery architectures:
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5/16" Opening: Perfectly sized to hold a 5/16" O.D. hard line, which serves as the standard return or vent line size in most automotive setups.
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3/8" Opening: Perfectly sized to secure a 3/8" O.D. hard line, the industry standard for high-volume feed lines supplying carbureted or Electronic Fuel Injection (EFI) systems.
By locking your fuel feed and return lines into a single, rigid stainless steel clamp, you maintain exact line separation. This prevents the plumbing from rubbing together, eliminating dangerous metal-to-metal friction and harmonic vibrations under the car.
Precision Sizing and Versatility
Kugel Komponents sizes these clamps by their exact Inside Diameter (I.D.), which directly corresponds to the Outside Diameter (O.D.) of the line or hose you need to secure. Whatever the total O.D. of your plumbing is—that is the clamp size required.
To help plan the rest of your vehicle layout, refer to this quick reference guide for other popular automotive hose and cable dimensions:
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-3 AN Stainless Braided Hose 1/4″ Clamp
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-4 AN Stainless Braided Hose 5/16″ Clamp
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-6 AN Stainless Braided Hose / Most Battery Cables 1/2″ Clamp
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-8 AN Stainless Braided Hose / 3/8″ Rubber Fuel Line 5/8″ Clamp
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-10 AN Stainless Braided Hose 3/4″ Clamp
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-12 AN Stainless Braided Hose / 5/8″ Heater Hose 7/8″ Clamp
Premium Construction
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Heavy-Gauge Stainless Steel: Stamped from premium, corrosion-resistant stainless steel that handles extreme under-car environments without rusting, pitting, or losing its finish.
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Low-Profile Allen Hardware: Each kit comes complete with 10/32 stainless steel button head Allen screws, providing a sleek, snag-free flush mount when torqued down against your chassis.
Technical Summary
| Feature |
Detail |
| Clamp Combo Sizes (I.D.) |
5/16" and 3/8" Staggered Openings |
| Primary Application |
Parallel Routing for Fuel Feed & Return Hard Lines |
| Material |
Heavy-Gauge Stainless Steel |
| Pack Quantity |
6 Clamps & 6 Screws |
| Hardware Thread Size |
10/32" |
| Hardware Style |
Button Head Allen Drive |
Installation Tip
To mount these dual-line clamps, you will need to drill and tap your chosen mounting surface for a 10/32 thread. Because you are securing two fluid lines under a single fastener, applying a drop of medium-strength blue threadlocker to each screw is highly recommended to protect against road vibrations and ensure your plumbing remains safely locked down.
