Big End Performance NPT Allen Pipe Plug

The Big End Performance NPT Allen pipe plug (also called an Allen socket pipe plug or hex socket NPT plug) seals off unused ports, fittings and lines in fuel, oil, coolant and other fluid systems. It suits performance, racing and custom plumbing builds.

Key Features:

• Lightweight 6061 aluminum construction keeps weight down.
• Anodized finish adds surface durability.
• Male NPT (National Pipe Taper) threads for a snug, sealing thread engagement.
• Internal Allen (hex socket) head installs and removes with a standard Allen wrench. The low-profile head leaves no external hex protruding.

Use these plugs to cap off spare bungs, gauge ports and unused openings. They give a clean, finished look in engine bays, fabricated systems and custom fluid setups. Choose the variant with the NPT thread size that matches your port.