Gas Cans, Fuels Replacement Jug Cap, Racing Fuel 3042 Replacement Cap for 5 Gallon Racing Fuel Jugs, Gas Cans, Fuel Tank Cap - 2 Pack

What It Is

This is a replacement cap (2-pack) designed for 5-gallon racing fuel jugs and standard gas cans. It’s intended for use with utility vehicles, lawn equipment, and race fuel storage where a secure, leak-resistant seal is needed.

Fitment & Compatibility

Before buying, check the following:

• Thread size and type: This cap fits 5-gallon racing fuel jugs with a standard 2-inch threaded neck (common to most VP Racing, JEGS, and similar jugs). Measure your jug’s neck opening—if it’s smaller or larger, this cap won’t seal.
• Vent vs. non-vent: The 3042 cap is non-vented (sealed). If your jug requires a vented cap for pouring, this won’t work. Confirm your jug’s original cap had no vent hole.
• Brand/model: Designed for “Racing Fuel 3042” jugs; not guaranteed to fit generic gas cans or older metal cans with different thread pitches.
• OEM vs. aftermarket: This is an aftermarket replacement. It may not match OEM cap color or material exactly.

Key Things to Know

• Material quality: Made from plastic; some users report cracking if over-tightened. Hand-tighten only—don’t use tools.
• Installation difficulty: Trivial—just unscrew old cap, screw on new one. No tools required.
• Common gotcha: The cap may not seal on jugs with damaged or deformed threads. Inspect your jug’s neck for cracks or warping before buying.
• Leak risk: Because it’s non-vented, pressure can build in hot weather. Open slowly to avoid fuel spray. Not ideal for prolonged outdoor storage in direct sun.

Should You Buy It

If you need a cheap, quick replacement for a non-vented 5-gallon racing fuel jug cap and your jug’s threads are in good shape, this 2-pack is a decent value. But if you need a vented cap, a tighter seal for long-term storage, or a cap for a standard household gas can, look elsewhere.