-20 Plastic Cap 5pk

The -20 Plastic Cap 5pk from ALLSTAR PERFORMANCE is an essential accessory for any serious automotive builder or mechanic managing fuel system components. These caps serve as protective covers for AN-20 ports commonly found on fuel lines, oil coolers, transmission coolers, and carburetor fittings in street rods, race cars, and performance builds. Whether you're assembling a custom fuel system, winterizing equipment, or protecting unused ports from contamination and debris, this five-pack ensures you have spares on hand for multiple projects or future upgrades.

These plastic caps are engineered from durable polymer material that resists fuel, oil, and coolant exposure while remaining lightweight and corrosion-free. The -20 designation refers to AN-20 port sizing, a standard hose and fitting specification in high-flow fuel delivery and cooling systems. By sealing unused AN-20 connections, these caps prevent fuel siphoning, moisture ingress, and contaminant entry—critical for maintaining system integrity during storage, transport, or component swapping. The compact 5-pack configuration weighs just 0.11 lbs, making them an unobtrusive but invaluable addition to your garage inventory.

Mechanics and fabricators working on fuel injection conversions, aftermarket cooling systems, and modular engine swaps will find this set indispensable. Installation is instantaneous—simply thread or push the cap onto any open AN-20 male port to create an airtight seal. These caps are compatible with ALLSTAR PERFORMANCE fittings and any standard AN-20 connection, including 1/2-inch NPT and AN flange designs commonly used in automotive performance applications. Keep them in your toolkit for quick system troubleshooting, pressure testing, or protective storage.