3/8in NPT Hex Head Pipe Plug 2/pkg Red

The 3/8in NPT Hex Head Pipe Plug 2/pkg Red from REDHORSE PERFORMANCE is an essential fluid system component for custom automotive builds, engine modifications, and hydraulic line termination. Whether you're plumbing a custom cooling system, fuel system upgrade, or pressure line network, these hex head plugs seal unused NPT ports cleanly and reliably. Two plugs per package provide the redundancy and quantity needed for medium-scale projects or to maintain spare inventory in your shop.

Manufactured with a hex head design for secure wrench engagement, these 3/8 inch NPT plugs deliver consistent thread seal when properly torqued into female NPT ports. The red finish provides high visibility for quick identification during assembly and troubleshooting, reducing the risk of accidentally connecting lines to sealed ports. NPT (National Pipe Thread) taper ensures a mechanical bite that strengthens with proper assembly, eliminating the need for constant re-tightening common with straight-thread alternatives. The compact geometry allows installation in tight engine bay locations where space constraints are critical.

Performance builders, fabricators, and professional mechanics rely on REDHORSE plugs for fuel injection systems, intercooler setups, transmission cooler installations, and custom manifold work. Use pipe thread sealant tape or liquid thread sealant on the tapered threads to ensure leak-free operation under pressure. Compatible with any system operating standard NPT port sizing—oil, coolant, fuel, and pneumatic applications all benefit from this reliable termination solution. Stock these 2-packs for inventory efficiency on larger restoration projects or maintain multiple packs for ongoing fabrication work.