CheeMuii 43-Piece Brass DOT Air Line Fittings Kit — Push-Lock & NPT, CA360 Brass, 1/8–1/2 in Tubes

CheeMuii 43-piece brass DOT air line fittings kit is a complete push-lock and NPT-threaded assortment designed for DOT-compliant air brake and pneumatic connections.

This kit gathers commonly used brass fittings, a Schrader inflation valve, and a tube cutter into one portable set so you can repair or assemble air brake lines, air suspension tubing, and general pneumatic connections without hunting for individual parts. The pieces are machined from CA360 brass and are built to meet DOT and SAE air system standards for durability and compatibility with steel and copper tubing.

What components are included and which tube sizes do they fit?

The set contains 43 pieces made to accommodate common airline diameters for vehicle and workshop use. It includes push-lock connectors and threaded NPT parts so you can mix quick-connect joins with traditional threaded fittings.

• 6 brass tube tee fittings — for creating three-way splits
• 6 straight union connectors — for joining two lengths of tubing
• 14 straight push connectors with NPT thread — push-to-connect plus male NPT
• 14 90° elbows with NPT thread — right-angle threaded connections
• 2 brass 1/4" Schrader inflation valves — for topping off pressure
• 1 tube cutter — for clean, square tube cuts
• Compatible tube sizes: 1/8", 1/4", 3/8", 1/2"

How durable are the fittings and what standards do they meet?

The fittings are produced from CA360 brass, which offers corrosion resistance and good ductility at elevated temperatures. The components meet DOT FMVSS 571.106 and follow SAE J1131 requirements for air brake system fittings, making them suitable for many vehicle air applications.

• Material: CA360 brass — low permeability and corrosion resistance
• Compliance: DOT FMVSS 571.106 and SAE J1131-compatible design
• Pre-applied NPT sealant on male threads to improve sealing

What pressure and temperature range can these fittings handle?

These brass fittings are rated for a wide operating envelope, making them useful for most automotive and light-industrial pneumatic tasks. Always cross-check with your tubing manufacturer's pressure and temperature guidelines before final installation.

• Pressure capability: vacuum up to 800 psi
• Temperature range: -65°F to +200°F (-40°C to +93°C)
• Recommended: verify tubing ratings and routing for safe long-term service

How easy are they to install and what tools are needed?

The push-to-connect design simplifies many installations—tubing typically just pushes into the connector for a secure hold—while the NPT-threaded parts use standard pipe thread engagement with pre-applied sealant. The included tube cutter gives you a neat cut; for final torque on threaded parts use appropriate wrenches to avoid overtightening.

• Quick-connect action for push fittings—no ferrules needed
• NPT male threads include pre-applied sealant for faster sealing
• Included tube cutter for clean tubing ends; use wrenches for threaded joints

Who is this for? This CheeMuii kit is aimed at mechanics, RV and truck owners, fleet technicians, and DIYers who maintain air brake lines, air suspension systems, or pneumatic components. It provides a compact assortment for roadside repairs, shop projects, and routine maintenance where DOT-compatible brass fittings are required. If you need a portable selection of push-lock, elbow, tee, and threaded fittings for 1/8" to 1/2" tubing and want DOT/SAE-oriented materials and ratings, this set covers those bases without buying parts separately.