SKU: AED6332X
MPN: 6332X
The Brass Sight Plug (10pk) from Advanced Engine Design is a 10-pack of brass blanking plugs sized at 0.45 inches in diameter, built for sealing unused ports on engine blocks, cylinder heads, and intake manifolds. Builders reach for these when an original sensor, sight gauge, or accessory comes off during a custom build and the open port needs to stay clean. Brass construction holds up against coolant and vacuum exposure where steel would corrode. They install threaded or press-fit depending on the port, and the 10-count pack keeps spares on the bench so a single missing plug doesn't stall an air and fuel project.
Each plug measures 0.45 inches in diameter and ships in a pack of 10, with the full set weighing roughly 0.03 lbs. The brass material does the real work here: it resists corrosion from coolant and fuel vapor better than plated steel, and it seals cleanly against both threaded coolant ports and vacuum fittings. Installation runs threaded or press-fit, so the same pack covers tapped holes and smooth bores. These are a common fit for Holley carburetor sight ports, which is where many builders use them alongside a Holley float or fresh metering hardware during a rebuild. Keeping a handful on hand means you cap a port the moment a sensor or gauge comes out, rather than leaving it exposed to shop debris.
Reach for these during a carburetor rebuild, an engine bay tidy-up, or any time you delete an accessory and need to close the port it leaves behind. They pair naturally with carburetor work, fuel system upgrades, and sensor swaps where ports open and close as the build evolves. Because brass shrugs off corrosion, they work just as well on a marine setup as on a street engine. Buyers replenishing carburetor and metering parts often grab these alongside a power valve plug or other small sealing components from our air and fuel lineup. The 10-pack makes sure you've got a backup before the next teardown.
They seal unused ports on engine blocks, cylinder heads, and intake manifolds, including Holley carburetor sight ports. When you remove a sensor, gauge, or accessory during a build, the plug caps the open port to keep coolant in and shop debris out.
Each plug installs threaded or press-fit depending on the port. Tapped ports take the threaded fit, while smooth bores accept a press-fit. The 0.45 inch diameter covers the common port sizes found on automotive coolant and vacuum fittings.
Brass resists corrosion from coolant and fuel vapor far better than plated steel, so the seal holds up over time. That makes these plugs a sound choice for marine engines and any application where moisture exposure is a concern.
Each pack contains 10 plugs. The 10-count keeps spares on hand so a single missing plug won't stall a rebuild, and it covers multiple ports across a single engine build.
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