Fleece FPE-NPT-38 3/8 in NPT Hex Socket Plug Black | Universal

Fleece 3/8" NPT Hex Socket Plug – FPE-NPT-38 Universal Fitment The Fleece FPE-NPT-38 3/8" NPT Hex Socket Plug is a compact, durable solution for sealing unused NPT ports in a wide range of automotive and diesel performance applications. Ideal for use in fuel systems, coolant bypass lines, oil routing, or intake components, this plug ensures a leak-proof, professional finish for your build. Built from high-strength steel and finished in a corrosion-resistant black coating, it’s designed to handle extreme pressure, vibration, and temperature—making it a dependable choice in any environment. Key Features: - 3/8" NPT hex socket plug - Ideal for capping unused ports in fuel, coolant, air, or oil systems - Precision-machined threads ensure a tight, leak-free seal - Black oxide coating provides long-term corrosion resistance - Low-profile hex socket for easy installation in tight spaces - Great for custom fabrication and high-performance diesel setups - Made in the USA by Fleece Performance Engineering Warranty: Backed by Fleece’s limited lifetime warranty. Contact Fleece Performance for coverage and support.