1/8 NPT male plug in 304L stainless steel, designed to cleanly and permanently block an unused port on an engine or supercharger circuit.

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This 1/8 NPT male plug is the ideal solution for blocking a port that is no longer needed, particularly when engine modifications or specific assemblies are involved.

For example, it can be used to :

• plug an oil pressure sensor port
• block a temperature port
• block a dump valve or wastegate inlet

The tapered NPT thread ensures a mechanical seal:

The tighter you tighten it, the tighter it seals.

For maximum safety, we recommend using :

• threadlocker
• or PTFE tape (Teflon)

Made from 304L stainless steel, this plug offers excellent resistance to :

• corrosion
• to heat
• to hydrocarbons

Its internal Allen recess allows for clean, discreet and clutter-free installation, even in hard-to-reach areas.

🔧 Sold individually

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⚙️ Technical specifications

• Type: Male plug
• Thread: 1/8 NPT (tapered)
• Material : 304L stainless steel
• Impression : Allen key (internal)
• Outside diameter: 9.5 mm
• Total height: 8 mm
• Sealing: Conical thread + PTFE or threadlocker
• Resistance: Heat, oil, fuel

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🧰 Applications

• Prepared motors
• Pressure/temperature sensors removed
• Dump valve
• Wastegate
• Oil circuits
• Turbo projects
• Competition vehicles

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🔧 Installation tips

• Clean the thread before fitting
• Apply threadlocker or PTFE tape
• Tighten gradually (do not overtighten)
• Check for leaks after pressurisation

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✅ Product benefits

• ✅ Self-sealing NPT tapered thread
• ✅ Anti-corrosion 304L stainless steel
• ✅ Compact size
• ✅ Discreet Allen keyway
• ✅ Oil / air / pressure compatible
• ✅ Simple and reliable assembly
• ✅ Ideal for engine preparation
• ✅ Professional quality Discount Autosport