Description

Overview

The 3/8 tube x 1/4 NPT push-in male connector provides a straight transition from imperial nylon air-brake tube to a threaded pneumatic port. The larger 3/8″ tube connection supports higher-flow lines while the compact brass body keeps the tube aligned directly with the receiving component.

Features

• Push-in connection accepts 3/8″ outside-diameter imperial nylon tube
• 1/4 NPT male thread connects to a compatible female port
• Straight brass body includes a hex section for controlled tightening
• Release collet allows the tube to be removed after depressurising the system

Specifications and Materials

This straight male connector combines a 3/8″ push-in tube port with a 1/4 NPT male thread. The push-in end contains the gripping collet and pneumatic seal required to retain compatible tube, so a separate compression nut, olive and tube insert are not needed. Part number: 88-003-0604.

Refer to the official D.O.T. push-in fittings catalogue

Compatibility and Fitment

Confirm the air line measures 3/8″ across its outside diameter and that the receiving component has a 1/4 NPT female port. The 3/8″ measurement identifies the tube size, not the thread. Avoid substituting 10mm metric tube or a 1/4 BSP fitting, as these connections differ despite their similar nominal sizes.

Cut the tube square, remove burrs and push it through the collet until it reaches the internal stop. Pull back lightly to check that the gripping mechanism has engaged. These cross-references show where this part replaces the part numbers and applications listed. Some installations may need minor changes. DQ68DOT0604, 1168X6X4

Compliance and Safety

Fully depressurise the pneumatic system before installing the connector or releasing the tube. Inspect the tube near the sealing area for scoring, flattening, contamination or heat damage. Tighten through the body hex and prevent sealing material from entering the air passage.

Pressurise the system gradually after installation, then leak-test the threaded port and push-in connection. Replace damaged tube rather than relying on additional insertion force to seal a worn surface.

Trailer Applications

Workshops fit this connector where a 3/8″ nylon air line enters a valve, manifold, air reservoir accessory, suspension control or other pneumatic component with a 1/4 NPT female port. The straight format suits installations where the tube approaches the component in line without requiring an elbow or tee.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Why Choose ICS Trailers

ICS Trailers supplies push-in connectors, unions, elbows and threaded adaptors for trailer pneumatic repairs. If the existing fitting is difficult to identify, send a clear photo and confirm the tube outside diameter, male thread size and port thread type.

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