Parker H3G Pneumatic Hose Coupling 3/4-14 Nptf Steel

Product Description

The PARKER H3G is a pneumatic hose coupling connector designed for industrial compressed-air and pneumatic fluid-power systems. Built to the Industrial Interchange standard, it accepts female NPTF threaded connections at a 3/4-14 thread size and is rated for a maximum working pressure of 300 psi. The steel body measures 0.75 inches in diameter and 2.22 inches in overall length, finished with zinc chromate for corrosion resistance. Licensed trades and industrial maintenance technicians install this connector where a reliable, pressure-rated threaded coupling is required at hose-to-tool or hose-to-manifold junctions.

The H3G is suited for industrial pneumatic applications including air-tool connections, compressor distribution lines, and shop-floor pneumatic circuits. Its Industrial Interchange configuration makes it a common fitment across a wide range of pneumatic hose assemblies in manufacturing, maintenance, and service environments. The threaded NPTF design provides a leak-resistant seal without the need for supplemental thread sealant tape under proper make-up conditions, though site practice and system requirements govern final sealing choices.

Key Features

• Industrial Interchange coupling type for broad pneumatic system compatibility
• Female NPTF 3/4-14 threaded connection for leak-resistant make-up
• 300 psi maximum working pressure rating
• Steel construction with zinc chromate finish for corrosion resistance
• 0.75-inch body diameter and 2.22-inch overall length for compact inline fitment
• 1.31-inch hex size for standard wrench installation

Compatibility

Designed as an OEM-style Industrial Interchange pneumatic hose coupling connector for use with 3/4-inch female NPTF threaded pneumatic hose and fitting assemblies in industrial compressed-air systems.

Installation Notes

Installation is performed by qualified industrial maintenance technicians or licensed pipefitters working on pneumatic systems. Before servicing any coupling, depressurize the line completely and verify zero residual pressure. Use the 1.31-inch hex and an appropriate wrench to achieve proper thread make-up torque per shop standards; do not over-tighten, as NPTF threads are self-sealing by interference and excess torque can damage the fitting. Follow applicable OSHA and ASME B31.3 guidelines for industrial pneumatic piping assemblies.