Five Pack Air Brake Nylon Tubing Brass Union Fittings Three Eighths Inch Tube Outside Diameter To One Fourth Inch NPT Thread Straight Compression Fittings For Nylon Hose DOT Approved For Truck Trailers

Five-Pack 3/8 OD to 1/4 NPT Air Brake Fittings
✔️ 5 pieces, 3/8 in. (9.5 mm) Tube OD to 1/4 in. (6.35 mm) NPT straight brass fittings

These brass compression fittings are designed to connect 3/8 in. tubing to 1/4 in. NPT ports, a common setup in air brake lines for trucks, trailers, and automotive pneumatic systems. DOT-approved and SAE J1131 compliant, they deliver reliable, leak-free connections.

✅ High quality CA360 brass with red sealant for corrosion resistance
✅ DOT FMVSS 571.106 compliant for secure air brake connections
✅ Working pressure up to 250 psi; temperature range -40°F to 200°F (-40°C to 93°C)
✅ Ideal for automotive, pneumatic and air brake systems using nylon hoses
✅ Includes 5 pieces for replacement and sharing

💡 What is a brass air brake fitting used for in truck systems?

These handy parts connect nylon lines to NPT ports for secure, leak-free operation. - handy for joining 3/8 in. tubing to 1/4 in. NPT ports in air brake or suspension systems - ideal for DOT-approved nylon hoses with brass compression fittings - offers corrosion resistance with CA360 brass and red sealant, rated to 250 psi