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The PARKER 3E is a female NPTF threaded pneumatic hose connector designed for automotive and industrial compressed air systems. Built from steel with a zinc chromate finish, this connector features a 3/8 inch body diameter and a 3/8-18 NPTF thread for a leak-resistant, pressure-tight seal without the need for additional thread sealant. The Tru-Flate design is a widely recognized standard in automotive service and light industrial air tool applications. Licensed HVAC techs, plumbers, mechanics, and general tradespeople working with compressed air lines will find this connector straightforward to install and compatible with standard shop equipment.
This connector is suited for use in automotive service bays, light industrial facilities, and any compressed air distribution system that uses the Tru-Flate automotive coupler standard. It is typically installed at the hose or tool end of a pneumatic line where a female threaded port is required. The 3/8-18 NPTF thread size is common in mid-range air tool and compressor fittings, making this connector a practical replacement or expansion fitting in existing pneumatic networks.
Designed as an OEM-style replacement or standard connector for compressed air systems using the Tru-Flate automotive coupler standard with 3/8-18 NPTF female threaded ports.
Installation should be performed by a qualified tradesperson familiar with compressed air systems. Always depressurize the air line and disconnect the compressor before servicing any pneumatic fitting. NPTF threads are designed to seal on the thread form itself, but inspect threads carefully before installation and use appropriate thread practices per applicable codes. Do not overtighten, as this can damage the thread form or the fitting body.
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