Description

Overview

The 1/2 NPSF sealing coupling adaptor connects a female-threaded air line port to a male quick-coupling nose used in truck and trailer pneumatic systems. Its internal shut-off mechanism closes when the adaptor is disconnected, helping contain air on the adaptor side of the connection.

This version suits applications that require a 1/2-inch female pipe thread and a sealing adaptor profile. Because thread form and valve arrangement affect fitment, compare both ends with the existing fitting before replacement.

Features

• Female 1/2 NPSF threaded port
• Male adaptor nose for CA93 and SA93 style coupling systems
• Internal sealing valve for shut-off when disconnected
• Hex body provides secure spanner engagement during installation

Specifications and Materials

Product type: straight pneumatic quick-coupling adaptor with a female threaded port and male coupling profile.

Thread: 1/2 NPSF female.

Function: sealing adaptor with an integral shut-off mechanism.

Part number: 33-A90.

For general quick-action coupling dimensions and application guidance, see the ISO 6150 quick-action coupling standard overview

Compatibility and Fitment

Match the adaptor nose, 1/2 NPSF female thread and sealing configuration before ordering. The 1/2 NPSF sealing coupling adaptor must connect to a non-sealing coupling. Do not pair a sealing adaptor with a sealing coupling.

These cross-references show where this part replaces the part numbers and applications listed. Some installations may need minor changes. GP-920-08, GP92008, CA93-90, CA9390, SA93-90, SA9390

Related Parts

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

Compliance and Safety

Depressurise the air system before removal or installation. Inspect the nose, valve face, internal seal and female thread for wear, contamination or damage. Use the sealing method specified for the mating pipe thread, keep compound away from the valve, then pressure-test the connection and check for air leakage.

Trailer Applications

Workshops fit this adaptor to truck and trailer air-line connection points, including suzi-coil and detachable pneumatic hose arrangements, where the adaptor side needs to shut off after disconnection.

Cross-reference and Suitability

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

Why Choose ICS Trailers

When the mating coupling is difficult to identify, send through the old fitting markings, thread size and clear photos of both connection halves. ICS Trailers can help narrow down the correct sealing arrangement before you order.

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