HASAOMOI DOT Air Brake Hose End Fittings 4PCS 3/8" Hose x 1/2" Male — Brass, 300 PSI Durable Seal

HASAOMOI 4PCS Brass DOT 3/8” Hose x 1/2" Male Air Brake Hose End Fittings are heavy-duty, DOT-compliant brass couplers designed to provide leak-resistant connections for truck and trailer air brake hoses.

These four brass hose ends are engineered for use in air brake systems on commercial vehicles and industrial equipment. Made from CA360 brass and manufactured to meet DOT FMVSS 571.106 and SAE J1402 specifications, the fittings deliver durable sealing performance, corrosion resistance, and reliable operation at working pressures up to 300 PSI. They are intended as replacement hose ends or as upgrades when you need robust, service-ready connections that withstand harsh road and weather conditions.

How do these fittings ensure a secure, leak-free connection?

Precision machining and the use of CA360 brass produce a tight, durable seal between hose and fitting. The design minimizes movement at the junction and reduces the chance of air leaks that compromise braking performance or efficiency.

• Precision-cut threads and seating surfaces for consistent compression.
• Brass material resists deformation under repeated use and pressure cycles.
• Factory-tested to meet DOT and SAE tolerances for air brake components.

Will these fittings hold up to corrosion and heavy use?

The brass composition offers strong corrosion resistance compared with many plated steels, helping fittings last longer in wet, salty, or chemically exposed environments. Their wear-resistant construction maintains mechanical integrity even after repeated connect/disconnect cycles and exposure to road grime.

• CA360 brass formulation improves resistance to rust and pitting.
• Solid construction reduces the risk of cracking or thread wear over time.
• Suitable for outdoor, trailer, and vocational vehicle applications.

Are these compatible with my existing air brake hoses and system pressure?

These fittings are sized for 3/8" hose (DOT air brake style) with a 1/2" male threaded connection; they are commonly compatible with standard air brake hose assemblies and quick-connect lines. They are rated for normal operating pressures up to 300 PSI, matching typical commercial vehicle air system requirements.

• Designed for 3/8" DOT air brake hoses and corresponding sleeves.
• 1/2" male thread fits standard mating couplers and fittings.
• Pressure rated to function normally at or below 300 PSI working pressure.

How should I install and maintain these hose ends for best performance?

Installation requires cutting the hose squarely, inserting the hose into the brass sleeve, and assembling per the hose manufacturer's crimp or clamp procedure. Periodic inspection for tightness, corrosion, and wear will extend service life and keep the air system operating safely and efficiently.

• Follow your hose supplier’s crimping or clamping instructions when fitting the sleeve.
• Inspect seals and threads during routine vehicle maintenance intervals.
• Replace fittings that show thread damage, cracking, or persistent leakage.

Who is this for: mechanics, fleet maintenance technicians, truck owners, and industrial operators who need dependable, DOT-approved hose ends for air brake lines. Whether you keep a parts bin for repairs or perform scheduled maintenance on trailers and heavy trucks, this 4-pack from HASAOMOI gives you DOT-compliant brass fittings that balance durability, sealing reliability, and corrosion resistance for demanding on-road and off-road conditions.