Description

Overview

The 3/8in tube x 1/4 NPT compression fitting connects J844 nylon air-brake tube to a matching female threaded port. Its straight brass body suits compact pneumatic connections where the tube runs directly into a valve, manifold, reservoir or control component.

This male adaptor is configured specifically for 3/8in outside-diameter tube and a 1/4 NPT port. The compression end includes the components needed to grip, support and seal the nylon tube during assembly.

Features

• Straight male adaptor for 3/8in nylon tube
• 1/4 NPT male pipe thread with pre-applied thread sealant
• Brass body with separate spanner flats for controlled installation
• Includes compression nut, olive and preassembled tube insert

Specifications and Materials

Product type: straight brass air-brake compression male adaptor.

Tube connection: 3/8in outside-diameter J844A or J844B nylon tube.

Pipe connection: 1/4 NPT male thread.

Pressure rating: medium-pressure service up to 200 PSI or 1400 kPa.

Temperature range: 0°C to 120°C.

Included components: compression nut, olive and tube insert.

Part number: 36-003-0604.

Review the official NTA and 1400 Series air-brake fitting guide for fitting-family and tube information

Compatibility and Fitment

Confirm the nylon tube measures 3/8in across its outside diameter and that the receiving port has a female 1/4 NPT thread. The main ordering risk is confusing the tube size with the thread size or choosing a similar adaptor with a 3/8 NPT connection.

Cut the tube square, remove burrs and insert it fully over the internal tube support before tightening the compression nut. These cross-references show where this part replaces the part numbers and applications listed. Some installations may need minor changes. GP68CDOT0604, 1468X6X4

Related Parts

Check the related service parts below against the trailer setup before ordering.

Compliance and Safety

Depressurise the pneumatic system before removing or fitting the connector. Inspect the tube for scoring, flattening, heat damage or contamination where the olive seals. Replace damaged tube rather than tightening the nut further to compensate.

Hold the adaptor body with the correct spanner while tightening the connection. After assembly, restore pressure gradually and leak-test the pipe thread and compression joint before returning the vehicle to service.

Trailer Applications

Truck and trailer workshops use this connector when routing 3/8in nylon tube into 1/4 NPT ports throughout air-brake plumbing. Typical connection points include pneumatic valves, distribution manifolds, reservoirs and trailer control equipment.

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 compression fittings, nylon air line and individual tube connection components for truck and trailer pneumatic repairs. If the existing fitting is difficult to identify, send through its markings, the measured tube outside diameter and the receiving port size.

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