CheeMuii Brass DOT Air Line Fittings Kit — 43-Pc Push-Lock CA360 Brass, 800 psi

CheeMuii 43 Pcs Brass DOT Air Line Fittings Kit is a complete push-lock and NPT-threaded brass air brake fitting assortment built for DOT-compliant airline, suspension, and hauling repairs.

This all-in-one kit supplies the common brass DOT fittings technicians, fleet managers, and DIYers need to maintain or repair air brake and air suspension lines. The set combines push-to-connect straight fittings and 90° elbows with NPT-threaded unions and a small selection of inflation valves plus a tube cutter — all made from CA360 brass to meet DOT and SAE performance requirements.

What components are included and how do they match my tubing?

The kit contains a variety of sizes and connection types to cover standard DOT airline jobs and routine maintenance. Sizes support 1/8", 1/4", 3/8", and 1/2" tubing, and you’ll find push-lock straight connectors plus NPT-threaded unions and elbows for mixed systems.

• 6 brass tube Tee fittings for branch lines and diverts
• 6 straight union connectors for joining NPT lines
• 14 straight push connectors (NPT-threaded) for inline runs
• 14 90° elbow NPT fittings to redirect lines in tight spaces
• 2 brass 1/4" Schrader inflation valves and 1 tube cutter

How durable are these fittings under pressure and temperature extremes?

Fittings are manufactured from CA360 brass and designed to meet D.O.T. FMVSS 571.106 and SAE J1131 standards, providing corrosion resistance and stability across a wide range of conditions. They are rated to operate from vacuum up to 800 psi and between -65°F and +200°F, though you should also follow tubing manufacturer limits.

• CA360 brass construction for low permeability and rust resistance
• Rated working pressure up to 800 psi (consult tubing specs too)
• Temperature range suitable for most vehicle and workshop environments
• Pre-applied NPT sealant on male threads to reduce leaks

How simple is installation and what tools are needed?

The push-to-connect design significantly speeds up assembly: push tubing into the fitting until it seats and you have a secure connection. For NPT threaded parts, pre-applied sealant reduces the need for additional thread tape; a wrench and the included tube cutter are all that’s required for typical installs.

• Push-lock fittings: push in tubing — no ferrules or crimping required
• NPT parts: hand-start then tighten with wrench; sealant already applied
• Included tube cutter trims tubing square for better seals
• Minimal tools: wrench, cutter, and basic hand tools for busier jobs

Where can I use these fittings and what systems are they suited for?

The assortment is intended for vehicle air brake and suspension lines, copper tubing, and general pneumatic repairs in industrial or home workshop settings. They are commonly used on trucks, RVs, trailers, lawn equipment, and towing gear where DOT-compliant fittings are required.

• Air brake and air suspension repairs on trucks and RVs
• Repairing or extending copper airline tubing
• Workshop pneumatic lines, compressors, and garden machinery
• On-the-road emergency repair kit for fleet and towing applications

Who is this for: The CheeMuii 43-piece kit is aimed at mechanics, fleet maintenance crews, roadside technicians, and informed DIYers who need a DOT-compliant, versatile selection of brass airline fittings. If you work with vehicle airlines, maintain trailers or RVs, or want a compact workshop kit to service pneumatic lines, this set provides broad coverage with durable brass parts and quick-install features.