Parker 5FSC4N-316 Compression Tube Connector 1/4-18 Npt

Product Description

The PARKER 5FSC4N-316 is a stainless steel compression tube connector designed to join tubing to female NPT-threaded ports in high-pressure and extreme-temperature fluid or gas systems. The fitting transitions from a compression-style tube connection on one end to a 1/4-18 FNPT threaded connection on the other, providing a leak-tight, bite-type mechanical seal without the need for solder or flare tooling. Rated to 8,100 psi maximum working pressure, it handles temperatures from -425 degrees F to 1,200 degrees F, making it suitable for cryogenic, steam, hydraulic, and instrumentation applications. Licensed plumbers, pipefitters, and instrumentation technicians are the typical installers.

This connector is suited for use in commercial and industrial installations where tubing must interface with NPT-threaded components such as valves, manifolds, pressure gauges, or instrumentation fittings. Its 316 stainless steel construction resists corrosion in aggressive media including acids, chlorides, and high-purity process fluids. It is commonly found in process piping, pneumatic control lines, refrigeration instrumentation, and hydraulic test circuits where reliable tube-to-pipe connections are required.

Key Features

• Maximum working pressure of 8,100 psi for demanding high-pressure service
• Operating temperature range of -425 degrees F to 1,200 degrees F covers cryogenic through high-heat applications
• 316 stainless steel construction for corrosion resistance in aggressive or high-purity media
• Compression x FNPT end connections for tool-accessible, leak-tight tube-to-pipe transitions
• 1/4-18 NPT thread standard for broad compatibility with standard instrumentation and process components
• Compact, single-piece fitting with no solder or flare preparation required

Compatibility

Designed as an OEM-style compression-to-FNPT connector for use with compatible outside-diameter tubing in systems with 1/4-18 NPT-threaded female ports. Verify tubing outside diameter compatibility with the compression ferrule specification before installation.

Installation Notes

Installation is performed by licensed plumbers, pipefitters, or instrumentation technicians following applicable codes such as ASME B31.1, B31.3, or facility-specific process piping standards. Depressurize and isolate the system completely before disassembling or installing any compression fitting. Hand-tighten the compression nut onto the FNPT port, then advance with a wrench per the fitting manufacturer's turn count guidance for the ferrule type. Do not overtighten, as this can deform the ferrule and compromise the seal integrity.