FasParts 1/2″ Female NPT to 3/8″ Male NPT Brass Pipe Adapter – High-Pressure Fitting for Fuel, Air, Water & More

Premium Brass Pipe Adapter for All Your Connection Needs

The FasParts 1/2″ Female NPT to 3/8″ Male NPT Adapter is designed for those who demand strength, precision, and durability. Built from high-quality brass, this pipe fitting is capable of handling up to 1000 PSI and extreme temperatures ranging from -65°F to +265°F. Whether you’re working on a boat engine, home HVAC system, or automotive repair, this adapter ensures a secure and leak-free connection every time. ⛴️

Ideal for fuel, air, water, oil, and inert gas applications, this rugged connector is perfect for commercial, industrial, and DIY settings alike. It’s rust-resistant, easy to install, and built to last. Whether you’re mounting gauges, linking pipe systems, or reducing thread sizes, FasParts delivers a flawless fit you can trust.

Key Specifications

❓ Frequently Asked Questions

What does 1/2″ NPT to 3/8″ NPT mean?

This refers to the threading sizes on either end of the adapter. The 1/2″ Female NPT connects to a male-threaded 1/2″ NPT fitting, while the 3/8″ Male NPT threads into a female 3/8″ NPT connection. It’s a reducer fitting, perfect for connecting components with different thread sizes.

Can I use this brass adapter with fuel or oil? ⛽️

Absolutely! This adapter is ideal for handling various fluids including fuel, oil, air, water, and inert gases. It’s widely used in automotive systems, boats, RVs, and machinery. Just ensure all parts of your system are compatible with brass.

Is this pipe adapter rust-resistant? ️

Yes! Made of high-quality solid brass, the adapter is naturally resistant to rust and corrosion, making it suitable for both indoor and outdoor applications—even in high-moisture environments like marine or HVAC systems.

Does this fitting require any tools for installation?

For best results, it’s recommended to use a wrench to tighten the adapter. Always apply thread sealant tape (PTFE) to ensure a leak-proof seal and avoid over-tightening to protect threads.

What if I’m unsure about pipe thread sizes?

That’s a common question! NPT (National Pipe Thread) sizes don’t correspond directly to physical measurements. If you’re unsure, measure the inner diameter of the female fitting or the outer diameter of the male fitting and compare with a reliable NPT chart. Or simply contact FasParts customer support for quick help.

⚙️ Applications and Use Cases

• Automotive fuel & oil lines
• ⛴️ Marine engine plumbing
• ️ Industrial machinery & HVAC systems
• Residential water & gas lines
• Laboratory inert gas delivery setups
• DIY projects involving pipe size conversion

Why Choose FasParts Brass Pipe Adapters?

• Built to handle high pressure (up to 1000 PSI)
• Temperature-tolerant for extreme conditions ❄️️
• Made of solid, rust-proof brass for durability ️
• Compact, precision-machined threading for tight fits
• Perfect for industrial, commercial, and personal projects

Package Includes

• 1 x Brass Pipe Adapter (1/2″ FPT to 3/8″ MPT)
• Sealed packaging (brand new)

️ Installation Tips

1. Clean the threads before installation for best seal
2. Apply PTFE (Teflon) tape to the male threads
3. Hand-tighten first, then use a wrench to snug the connection
4. Test for leaks before full system operation

Trust FasParts – Engineered for Performance

When reliability and performance matter, FasParts delivers. Whether you’re upgrading your boat’s cooling line or building a custom fuel setup in your garage, this 1/2″ to 3/8″ brass NPT adapter will get the job done with confidence. From hobbyists to professional engineers, it’s the smart choice for long-lasting, leak-free pipe connections.