6PCS Gas Can Caps, 5 Gallon Gas Can Cap Replacement, Universal Coarse Thread Gas Cap for Gasoline, Portable Gas Tank Lid for Improved Sealing and Transportation

What It Is

This is a set of six universal coarse-thread gas can caps designed to replace lost, cracked, or leaky lids on standard 5-gallon portable gas cans. They’re intended for gasoline storage and transport, not for lawn mower fuel tanks themselves.

Fitment & Compatibility

Check two things before buying: thread type and can neck diameter. These caps use a coarse thread (typically 2-inch outer diameter with ~4 threads per inch), common on many generic and older 5-gallon cans. They will not fit fine-thread or metric-thread cans (like newer EPA-compliant safety cans with child-resistant features). Measure the inside diameter of your can’s neck—if it’s roughly 2 inches across and the threads are widely spaced, these should work. They are not brand-specific but are incompatible with most Blitz, Eagle, or newer No-Spill cans.

Key Things to Know

• Material quality: Made of plastic; some users report cracks after a few months of sun exposure or overtightening. Don’t expect heavy-duty durability.
• Seal performance: The included rubber gasket improves sealing, but it may not be fuel-proof long-term (check for swelling after gasoline contact). Test for leaks before filling a can fully.
• Installation: No tools needed—simply screw on by hand. Do not use a wrench or pliers, as the plastic threads can strip.
• Common gotcha: If your can has a vent or a separate vent cap, these caps do not include a vent hole. This can cause pressure buildup or fuel flow issues when pouring; you may need to drill a small vent yourself.

Should You Buy It

Buy this if you have a standard, older 5-gallon gas can with coarse threads and need a quick, cheap replacement for multiple caps—especially for storage or emergency backup. Skip it if you need a vented cap, a child-resistant design, or a cap for a modern fine-thread can; in those cases, buy a brand-specific replacement instead.