3/8 in NPT Hex Socket Plug Black

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.