3/4″ NPT Stainless Steel Boat Drain Plugs – 3 Pack

3/4″ NPT stainless steel boat drain plugs designed to seal transom drain holes on most boat hulls. Sold as a 3-pack.

These plugs are precision-cast from stainless steel with deep threads that grip firmly and resist loosening. Unlike hollow plugs that can rot and compromise hull integrity, these solid plugs offer durability, excellent ductility at high temperatures, and low magnetic permeability. The robust thread design ensures a tight, waterproof seal that won’t slip under use.

Suitable for most recreational boats including Bayliner, Four Winns, Glastron, Larson, Sea Ray, Starcraft, and many other models. Beyond boat applications, the 3/4″ NPT thread standard makes them useful for grease, fuel, LP gas, natural gas, refrigeration, instrumentation, and hydraulic systems operating at low to medium pressure.

Before ordering, verify your transom drain hole is a standard 3/4″ NPT size to ensure proper fit. Check your boat manual or measure the existing hole to confirm compatibility.

Installation is straightforward: simply thread the plug into the drain hole by hand until snug. Do not over-tighten, as this may damage the threads.