DOT Push In Female Elbow 90° Swivel

This DOT-compliant push-to-connect female swivel elbow (90°) is engineered specifically for safety-critical commercial vehicle air brake systems. The integration of a 360° swivel body allows stress-free tubing alignment in tight chassis and manifold configurations.

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Product Introduction

This DOT-compliant push-to-connect female swivel elbow (90°) is engineered specifically for safety-critical commercial vehicle air brake systems.

The integration of a 360° swivel body allows stress-free tubing alignment in tight chassis and manifold configurations.

Material Specifications

Component	Material Specification	Engineering Benefit in Severe Environments
Fitting Body	CA360 Brass / Forged DZR Brass	Excellent resistance to road salt, de-icing chemicals, and stress corrosion
Swivel Nut	Heavy-Duty CA360 Brass	High torque tolerance during NPT/NPTF thread engagement
Gripping Collet	302 / 316 Stainless Steel Grab Ring	High tensile grip on SAE J844 tubing, preventing pull-out under extreme vibration
Sealing Element	Dual-Ring Heavy-Duty NBR (Optional Viton)	Restricts leakage down to -40°C and offers resistance to ozone and oil vapor
Thread Sealant	Loctite Vibraseal 516 (Pre-applied)	Eliminates PTFE tape installation and reduces thread loosening caused by vibration

Technical Performance & Standards Compliance

Every batch of our DOT push-in fittings undergoes strict mechanical and thermal validation to support compliance with North American FMVSS regulations.

Key Performance Limits

Maximum Working Pressure: 150 PSI (10.3 bar)
Proof Pressure Limit: 300 PSI (No deformation and zero leakage)
Burst Pressure Limit: Greater than 600 PSI (greater than 41.3 bar at 23°C)
Operating Temperature: -40°F to 200°F (-40°C to 93°C)
Medium Compatibility: Compressed air systems (lubricated or oil-free)

Rigorous Testing & Compliance Portfolio

DOT FMVSS 571.106
Certified and permanently marked "DOT" on the fitting body.

SAE J1131 Mechanical Validation

Tensile Pull-Out Resistance exceeds the minimum pull-out requirements for both SAE J844 Type A and Type B nylon tubing.
High-frequency vibration testing completed under maximum working pressure conditions.
Extreme cold bend performance verified at -40°C.
Seal integrity maintained during 180° bending tests.

360° Swivel Design - Eliminating Tubing Tension

Traditional fixed 90° elbows can transfer engine and chassis vibration directly into the nylon tube, increasing the risk of fatigue cracking, tube deformation, and pull-out failures.

Chassis / Engine Vibration Dual O-Ring Swivel Joint Reduced Mechanical Stress on Nylon Tubing

The swivel elbow utilizes an internal snap-ring and dual O-ring sealing structure that allows the fitting head to rotate freely during installation while maintaining sealing performance.

Engineering Advantages

Simplifies assembly line routing.
Allows installers to thread the female port first and orient the push-in connection afterward.
Reduces tubing twist during installation.
Minimizes tube kinking in confined spaces.
Accommodates movement in suspension systems and articulated chassis designs.

Typical applications include:

Air suspension circuits
Cab tilt systems
Trailer slider axles
Pneumatic control manifolds

Standard Sizing Matrix & Part Numbers

Tube O.D.	Female Thread	Model Number	Pre-Applied Sealant	Standard Box Quantity
1/4"	1/8"-27 NPT	DOT-FE-90S-0402	Yes	100 pcs
1/4"	1/4"-18 NPT	DOT-FE-90S-0404	Yes	100 pcs
3/8"	1/4"-18 NPT	DOT-FE-90S-0604	Yes	50 pcs
3/8"	3/8"-18 NPT	DOT-FE-90S-0606	Yes	50 pcs
1/2"	3/8"-18 NPT	DOT-FE-90S-0806	Yes	25 pcs
1/2"	1/2"-14 NPT	DOT-FE-90S-0808	Yes	25 pcs

Available Upon Request

BSPP Threads
BSPT Threads
Metric Threads
Lead-Free Brass
DZR Brass Versions
Customer-Specific Configurations

Quality Assurance & Sourcing Logistics

100% Pneumatic Leak Testing
Every DOT fitting undergoes automatic pneumatic decay leak testing before packaging.
No statistical sampling bypass is used.

Available Quality Documentation

Material Test Reports (MTR) for brass chemistry verification
Certificate of Conformance (CoC)
Dimensional Inspection Reports
RoHS Compliance Declaration
REACH Compliance Declaration
PPAP Level 3 support for automotive OEM programs

Supply Chain Support

Laser marking with customer part numbers
Private label packaging
Custom carton labels
Scheduled production programs
JIT delivery arrangements for OEM supply contracts

FAQ

Q: Is this fitting approved for DOT air brake applications?

A: Yes. The fitting is designed for DOT air brake systems using compatible SAE J844 nylon tubing and supports FMVSS 106 applications.

Q: Can the swivel body rotate under pressure?

A: Yes. The swivel mechanism is designed to maintain sealing performance while allowing alignment adjustment during installation.

Q: What tubing types are compatible?

A: The fitting is designed primarily for:

SAE J844 Type A tubing
SAE J844 Type B tubing
PA11 air brake tubing
PA12 air brake tubing

Q: Does the fitting include thread sealant?

A: Yes. Loctite Vibraseal 516 thread sealant is pre-applied as standard on NPT thread configurations.

Q: Can the fitting operate in cold climates?

A: Yes. The standard NBR sealing system supports operation down to -40°C (-40°F).
For higher temperatures or aggressive media, Viton sealing options are available.

Q: Is DZR brass available?

A: Yes. Forged DZR brass versions can be supplied for applications exposed to aggressive environments, road salt, or moisture.

Q: Can the fitting be reused after removal?

A: In many maintenance applications, the fitting can be reused provided the grab ring and sealing components remain undamaged.
Inspection before reuse is recommended.

Q: Do you support OEM branding?

A: Yes. We provide: