Parker 4FSC6N-316 Compression Tube Connector 3/8-18 Npt

Product Description

The PARKER 4FSC6N-316 is a stainless steel compression tube connector designed to join a compression-end tube to a female NPT threaded port. Built for demanding fluid and gas systems, this fitting handles working pressures up to 10,300 psi and temperatures ranging from -425 degrees F to 1,200 degrees F. The 316 stainless steel construction resists corrosion in harsh service environments. One end accepts a compression tube connection for 1/4-inch OD tubing, while the other end is a 3/8-18 FNPT threaded port. Plumbers, pipefitters, and instrumentation technicians use this connector in high-pressure process, instrumentation, and pneumatic tubing runs.

This connector is suited for industrial, commercial, and process instrumentation applications where a compression tube line must transition to a female NPT fitting. Typical installations include hydraulic instrumentation lines, pneumatic control tubing, chemical process piping, and cryogenic systems given its extreme low-temperature rating. The stainless steel body makes it appropriate for corrosive media, high-purity gas service, and sanitary or offshore environments where carbon steel fittings are not acceptable.

Key Features

• Maximum working pressure of 10,300 psi for high-pressure system use
• Wide temperature range from -425 degrees F to 1,200 degrees F including cryogenic service
• 316 stainless steel body for corrosion resistance in aggressive media
• Compression x FNPT end connections for reliable tube-to-pipe transitions
• Accepts 1/4-inch OD tubing on the compression end
• 3/8-18 NPT thread standard for compatibility with standard pipe fittings

Compatibility

Designed as an OEM-style replacement or new-installation fitting for compression tube systems requiring a 1/4-inch OD compression to 3/8-18 FNPT transition in stainless steel construction.

Installation Notes

Installation is typically performed by licensed pipefitters, plumbers, or instrumentation technicians. Shut down and depressurize the system completely before removing or installing any compression fitting. Hand-tighten the NPT threads with an appropriate sealant or tape rated for the service media, then wrench-tighten to achieve a leak-free seal without over-stressing the fitting body. Follow applicable codes including ASME B31.3 for process piping or the relevant instrumentation tubing standard for the system being serviced.