Description

Overview

The 1/2 x 1/4 NPT hose barb connects flexible hose with a 1/2″ internal diameter to a female 1/4 NPT threaded port. Its straight brass body combines a full-size ribbed hose tail, central installation hex and tapered male thread. This configuration lets a larger hose terminate at a smaller threaded connection without adding a separate reducing adaptor.

Features

• 1/2″ barb is selected from the hose internal diameter
• 1/4 NPT male thread suits a matching female port
• Multiple ribs increase contact along the inserted hose end
• Hex shoulder allows controlled tightening without marking the barb

Specifications and Materials

Configuration: straight male hose barb.

Hose connection: 1/2″ internal-diameter hose.

Thread connection: 1/4 NPT male.

Material: brass.

Part number: 06-203-0804.

Use the GP-570 hose barb specification when checking the hose and NPT size combination

Compatibility and Fitment

Measure the clear opening inside the hose before ordering because the 1/2″ size does not refer to its outside diameter. Also confirm the receiving port uses a 1/4 NPT female thread. BSP and NPT threads can have similar nominal descriptions, but their thread forms differ and should not be forced together. The 1/2 x 1/4 NPT hose barb should enter the hose firmly without splitting the wall or remaining loose enough to rotate.

These cross-references show where this part replaces the part numbers and applications listed. Some installations may need minor changes. GP-570-0804, GP5700804

Compliance and Safety

Release all pressure and drain the circuit before installation. Apply sealant suitable for the thread and conveyed medium, keeping excess material away from the internal passage. Tighten the fitting through the hex, then push the hose fully over the ribbed section and secure it with the correct clamp or crimped ferrule. Restore pressure gradually and inspect both connection points for leaks or movement.

Trailer Applications

This fitting suits truck, trailer and workshop pneumatic layouts where a 1/2″ flexible hose connects to a smaller 1/4 NPT port. It may be used at compatible valves, manifolds, regulators or other equipment when the hose material, retaining method, pressure and medium suit the complete circuit.

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 brass hose tails, threaded adaptors, clamps and air line fittings for heavy vehicle repair work. When replacing an unmarked part, compare the hose bore, thread diameter, thread type and straight body layout before ordering.

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