Parker H3C-E Pneumatic Hose Coupling 1/4 in Female Nptf

Product Description

The PARKER H3C-E is a threaded pneumatic hose coupling connector designed for compressed air and pneumatic tool applications. Built to the Industrial Interchange standard, this connector features a 1/4-inch body diameter and a 3/8-18 female NPTF thread connection. The body is steel with a zinc chromate finish for corrosion resistance. Rated to 300 psi maximum working pressure, it is suited for shop air systems, pneumatic tool lines, and light industrial pneumatic circuits. Licensed HVAC techs, plumbers, and general contractors working with compressed air distribution will find this a direct-fit, standard-specification coupling connector.

This coupling is used in residential and light commercial compressed air systems where Industrial Interchange-pattern quick-connect fittings are the shop or facility standard. Typical installations include air compressor outlet lines, pneumatic tool drops, and in-line hose connections where a threaded female port is required. The 3/8-18 NPTF thread provides a pressure-tight seal without the need for additional sealant tape in most applications, though field practice varies.

Key Features

• Industrial Interchange pattern for broad compatibility with standard pneumatic quick-connect systems
• Female NPTF 3/8-18 thread for a pressure-tight mechanical seal
• 300 psi maximum working pressure rating
• Steel construction with zinc chromate finish for corrosion resistance
• 1/4-inch body diameter and 1.6-inch overall length for compact inline installation
• 0.81-inch hex size for standard wrench installation

Compatibility

Designed as an OEM-style replacement or new-installation connector for compressed air systems using the Industrial Interchange quick-connect coupling standard with 3/8-18 female NPTF threaded ports.

Installation Notes

Installation should be performed by a qualified technician after depressurizing and locking out the compressed air system. Use a correctly sized open-end or adjustable wrench on the 0.81-inch hex to avoid fitting damage. Consult applicable facility safety codes and the compressor manufacturer guidelines when integrating into existing pneumatic distribution lines. Inspect the mating thread and port for damage or contamination before assembly.