Description

Overview

The 1/4 tube x 1/8 NPT push-in male connector joins imperial nylon air-brake tube to a compatible female threaded port. Its straight brass body keeps the tube aligned with the port, while the push-in end removes the need for a separate compression nut, olive or tube insert.

Features

• Push-in connection accepts 1/4″ outside-diameter nylon tube
• 1/8 NPT male thread carries pre-applied sealing compound
• Straight brass body includes a hex for controlled tightening
• Release collet allows disconnection and reuse

Specifications and Materials

This QAF3 male connector combines a 1/4″ imperial tube port with a 1/8 NPT male pipe thread. The complete brass assembly contains the push-in collet, tube gripper and internal pneumatic seal. Red sealing compound comes applied to the tapered thread, so keep the coating clean before installation. Part number: 88-003-0402.

Review the manufacturer male connector specifications

Compatibility and Fitment

Confirm 1/4″ tube outside diameter and a matching 1/8 NPT female port before ordering. The 1/4″ measurement refers to the tube, not the threaded connection. Also avoid substituting BSP or metric threads, because similarly sized fittings may start in the port without forming the correct seal.

Cut the tube square, remove burrs and push it fully into the fitting until it reaches the internal stop. Then pull back lightly to confirm engagement. These cross-references show where this part replaces the part numbers and applications listed. Some installations may need minor changes. DQ68DOT0402, 1168X4

Compliance and Safety

Depressurise the pneumatic system before removing or installing the connector. Inspect the tube for scoring, flattening, heat damage or contamination near the sealing area. Hold the body hex while tightening the NPT thread, and keep sealing compound away from the air passage. After assembly, repressurise gradually and leak-test both connections.

Trailer Applications

Workshops fit the 1/4 tube x 1/8 NPT push-in male connector where a small nylon air line enters a valve, manifold, reservoir accessory or pneumatic control component. The straight layout suits installations where the tube approaches the port in line and does not require 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, elbows, unions and threaded adaptors for trailer pneumatic repairs. If the original 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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