Description

Overview

The 1/2 tube x 1/4 NPT push-in male connector joins a larger imperial nylon air-brake line directly to a smaller threaded pneumatic port. Its straight configuration suits installations where the 1/2″ tube approaches the component in line and no elbow, swivel or branch connection is required.

Features

• Push-in connection accepts 1/2″ 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
• Integrated release collet allows tube removal after the system is depressurised

Specifications and Materials

This D.O.T. male connector combines a 1/2″ push-in tube connection with a 1/4 NPT male pipe thread. The push-in end contains the gripping and sealing components needed to retain compatible nylon tube, so separate compression nuts, olives and tube inserts are not required. Part number: 88-003-0804.

Review the official D.O.T. push-in fittings catalogue

Compatibility and Fitment

Confirm that the air line measures 1/2″ across its outside diameter and that the receiving component has a 1/4 NPT female port. The 1/2″ measurement refers to the tube, while 1/4 NPT identifies the male thread. Do not substitute 12mm 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 firmly through the collet until it reaches the internal stop. Pull back lightly to confirm 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. DQ68DOT0804, 1168X8X4, 35-680804, 35680804, AQ68-DOT-8X4, AQ68DOT8X4, 1868X8X4, 3115 62 14DOT, 31156214DOT

Compliance and Safety

Depressurise the complete pneumatic circuit before installing the fitting or releasing the tube. Inspect the tube near the sealing point for scoring, flattening, contamination or heat damage. A damaged tube surface may leak even when it appears fully inserted.

Tighten the male thread through the body hex rather than applying force through the push-in end. Keep thread-sealing material out of the air passage, route the tube without side load and pressure-test both connections before returning the vehicle to service.

Trailer Applications

Workshops fit this connector where a 1/2″ nylon supply line enters a valve, manifold, reservoir accessory, suspension control or other pneumatic component with a 1/4 NPT female port. The combination allows the larger tube size to continue into equipment that uses a comparatively small threaded connection.

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, elbows, tees, unions and threaded adaptors for truck and trailer pneumatic repairs. If the existing connector is difficult to identify, send a clear photo and confirm the tube outside diameter, male thread size and thread type.

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