Parker 3/8 Fg-s Pipe Expander 3/8-18 Nptf Steel 6000 Psi

Product Description

The PARKER 3/8 FG-S is a steel NPTF pipe expander fitting designed for high-pressure hydraulic and industrial piping systems. It connects a 3/8-18 female thread to a 3/8-18 male thread using the NPTF (National Pipe Taper Fuel) thread form, which creates a pressure-tight mechanical seal without requiring a sealant compound. Rated to 6000 psi, this expander is suited for demanding fluid power and instrumentation applications where leak-free connections are critical. Typical installers include hydraulic system technicians, pipefitters, and industrial maintenance mechanics working on high-pressure plumbing assemblies.

This fitting is used in industrial piping systems where a same-size NPTF expander configuration is needed to transition between connection points in tight plumbing layouts. It performs in hydraulic power units, pneumatic systems, and fluid transfer lines operating at or below its rated pressure. The NPTF thread classification ensures compatibility with other NPTF-threaded components throughout the assembly, making it a reliable choice for both new installations and field repairs on industrial equipment.

Key Features

• Rated to 6000 psi for demanding high-pressure hydraulic and fluid power service
• NPTF thread form creates a dry-seal mechanical connection without sealant dependency
• 3/8-18 male and 3/8-18 female threads on a single expander body
• Steel construction provides strength and durability in industrial environments
• Compact expander design suits tight plumbing configurations

Compatibility

Designed as an OEM-style replacement or direct-install fitting for industrial piping systems using 3/8-18 NPTF threaded components rated for high-pressure service.

Installation Notes

Installation should be performed by a qualified pipefitter or hydraulic technician. Depressurize and isolate the system completely before removing or installing any fittings. NPTF threads are designed to seal on the thread form itself; inspect threads for damage before assembly and apply thread sealant only if required by the system specification. Follow applicable industry piping codes and the equipment manufacturer's torque and assembly guidelines.