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Anodized Aluminum Air Brake Coupling Nuts (Red/Blue).

Corrosion-resistant hose end fittings for visual safety.

  • Material: Anodized Aluminum (Rust Proof).

  • Colors: Red (Emergency) & Blue (Service).  

  • Type: Long Hex Nut (50-55mm).

  • Thread: 1/2″ NPT or M16x1.5.

  • Use: Tractor-Trailer Air Brake Hose Assembly.

In Stock & Ready to Ship.

📌 Product Overview

Visual Safety. Corrosion Proof Performance.

In the fast-paced world of trucking, connecting the wrong air line can be a disaster. Victory Technology’s Anodized Aluminum Coupling Nuts eliminate the guesswork. Finished in brilliant Red (Emergency) and Blue (Service), these fittings provide instant visual identification for safe and fast hook-ups.1

Manufactured in our Zhuji Aoke facility, these “Long Nut” style connectors are precision-machined from high-grade Aluminum Alloy. Unlike steel fittings that rust or brass fittings that tarnish, our Anodized Finish offers superior resistance to road salts, chemicals, and weathering, ensuring your air brake connections remain seizure-free and leak-proof for years.


🔹 Why Choose Victory Aluminum Coupling Nuts?

  • ✅ Premium Anodized Protection:Built for the road. The electrochemical anodizing process creates a hard, corrosion-resistant surface that protects the aluminum from oxidation and road salt.2 They maintain their bright color and structural integrity far longer than painted steel.
  • ✅ Instant Color Identification:Safety by design. The vibrant Red and Blue finish follows industry standards for Emergency and Service lines. This helps drivers and mechanics trace lines quickly during inspections or repairs, reducing the risk of cross-connection errors.
  • ✅ Lightweight yet Durable:Aluminum offers the perfect strength-to-weight ratio. It is strong enough to withstand high-pressure braking applications but significantly lighter than steel, reducing vibration stress on the hose assembly.
  • ✅ Precision Machined Threads:Leak-free guarantee. Whether you choose 1/2″-14 NPT or M16×1.5 threads, our CNC machining ensures a perfect fit with standard air brake fittings and spring guards.

🔸 Technical Specifications

Engineered for DOT Air Brake Assemblies.

Feature Specification
Product Name Air Brake Coupling Nut (Long Hex Style)
Material High-Grade Aluminum Alloy
Finish Anodized (Corrosion Resistant)
Colors Red (Emergency) / Blue (Service)
Thread Options 1/2″-14 NPT or M16 × 1.5 (Male)
Length 50–55 mm (Standard Long Nut)
Shape Hexagonal (Easy Wrench Grip)
Compliance Compatible with DOT / SAE J1402 Assemblies

🔹 Applications

  • Coiled Air Hoses: Used as the end fitting nut on spiral tractor-trailer air lines.

  • Rubber Hose Assemblies: Finishing nut for custom air brake hose fabrication.

  • Fleet Maintenance: Replacing corroded or stripped steel nuts during service.

  • OEM Assembly: Factory installation on new air lines for visual quality control.


❓ Frequently Asked Questions (FAQ)

Q: Will the color fade?

A: Our anodizing process is industrial grade. While prolonged exposure to intense UV over many years may cause slight fading, the corrosion protection remains intact.

Q: Are these compatible with brass fittings?

A: Yes. Aluminum nuts are commonly used with brass inserts/ferrules in air brake assemblies without issues.

Q: Do you offer custom thread sizes?

A: Yes. While 1/2″ NPT and M16 are standard, we can machine custom thread pitches (e.g., M18, M22) for specific OEM requirements.


🔶 Factory Direct Packaging (B2B)

Victory Technology offers flexible packaging for manufacturers and distributors:

  • Bulk Polybags: 50–100 pcs per bag (ideal for assembly lines).3

  • Master Cartons: 500–1,000 pcs per carton.

  • Custom Kits: Can be packaged together with springs and inserts as a repair kit.


🚀 Get a Factory Price Quote Now

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