HASAOMOI Brass DOT 3/8" Push-to-Connect Tee Union 4-Pack — CA360 Brass, 250 PSI Rated

HASAOMOI Brass DOT 3/8" Brass DOT Air Fittings are a four-pack of push-to-connect tee unions made from CA360 brass for durable, corrosion-resistant air and brake line connections.

These 3/8" tee unions from HASAOMOI are engineered for quick assembly of pneumatic and DOT-style tubing in automotive, trailer and workshop air systems. The fittings use a push-to-connect mechanism that speeds installation and simplifies disassembly while the CA360 brass construction offers toughness across a wide temperature range. Each pack contains four identical tee unions so you can replace worn parts or add a reliable branch line without sourcing multiple single components.

How do these tee unions make installation faster?

The push-to-connect design removes the need for clamps, thread tape, or soldering. Simply push the tube into the fitting for a sealed connection and press the release collar to remove the tube when needed. This method saves time on repetitive tasks and makes field repairs more convenient.

• Insert tubing straight into the fitting—no tools required for connection
• Quick-release collar allows fast disassembly for maintenance or replacement
• Uniform 3/8" tube outer diameter fits common DOT and nylon air lines

What materials and limits should I expect from these fittings?

HASAOMOI uses CA360 brass for the body, chosen for corrosion resistance and good mechanical strength at elevated temperatures. The fittings are rated for use from vacuum up to 250 psi and perform across a broad temperature span; check your tubing manufacturer's limits to confirm compatibility. This makes them suitable for typical vehicle and workshop air circuits.

• CA360 brass construction resists corrosion and wear
• Working pressure up to 250 psi for common pneumatic tasks
• Temperature range approximately -40°F to +200°F (-40°C to +93°C)

Which applications are these tee unions best suited for?

These fittings are intended for DOT-style air lines and compatible nylon or copper tubing used in automotive and light industrial systems. Typical uses include brake air lines, trailer connections, air-operated accessories and small workshop pneumatic circuits. They are a good choice when you need reliable branch connections without welding or complex fittings.

• Automotive and trailer air brake and horn lines
• Air-operated seats, gauges and heater controls
• Workshop air distribution, garden machinery repairs, towing setups

Who is this for: The HASAOMOI Brass DOT 3/8" Tee Union 4-pack is aimed at mechanics, hobbyists and fleet technicians who need dependable, easy-to-install branch fittings for DOT-style tubing. If you maintain trailers, repair small equipment, or build simple pneumatic systems and want a corrosion-resistant, tool-free connection method, these fittings provide a compact, reusable solution. Keep spare unions on hand for fast roadside fixes or to expand existing air lines without modifying the main runs.