Description

Overview

The 12mm air brake connector joins 12mm metric nylon tube to a 3/8 NPT female port in a trailer or heavy-vehicle pneumatic circuit. The straight connection suits layouts where the air line approaches a valve, reservoir or manifold in line with the threaded port.

Features

• Push-to-connect port suits 12mm outside-diameter nylon air brake tube.
• 3/8 NPT male thread connects to a matching tapered female port.
• Factory-applied thread sealant covers the male pipe thread.
• Brass hex body provides a dedicated surface for installation and removal.

Specifications and Materials

The fitting combines a brass body, internal tube support, gripping collet and pneumatic seal in one complete connector. The tube installs without a separate nut, olive, ferrule or compression sleeve.

Part number: 88-M003-12N06.

Review the Alkon metric air brake fitting technical guide

Compatibility and Fitment

Confirm the air line measures 12mm across its outside diameter and the receiving port uses a 3/8 NPT female thread. Do not substitute 1/2in imperial tube, which measures 12.7mm, or install the fitting into a BSP or straight metric port. These connections may look similar but use different dimensions and sealing methods. These cross-references show where this part replaces the part numbers and applications listed. Some installations may need minor changes. MDQ68DOT1206, 35-M681206, 35M681206, MAQ68-DOT-12X6, MAQ68DOT12X6, M1868X12X6

Related Parts

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

Compliance and Safety

Depressurise the air system before removing or installing the connector. Cut the tube square and remove any scored, oval or damaged section before pushing it fully through the collet. Tighten the fitting through the brass hex, keep the thread coating clean and avoid forcing the tapered thread into an incompatible port. Restore pressure gradually and leak-test both connections.

Trailer Applications

Workshops fit this connector where a higher-flow 12mm air line terminates at a 3/8 NPT port. Typical locations include brake valves, air suspension controls, pneumatic manifolds, reservoirs and auxiliary trailer air 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 metric and imperial pneumatic fittings for trailer brake, suspension and auxiliary air repairs. For identification help, send a clear photo and confirm the tube outside diameter, thread size and whether the port uses NPTF, BSP or metric thread.

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