Parker 4FSC2N-B Compression X Fnpt Tube Connector

Product Description

The PARKER 4FSC2N-B is a brass compression tube connector designed to join a compression tube end to a female NPT (FNPT) threaded port. It provides a secure, leak-resistant connection in fluid and gas systems where a compression fitting meets an NPT-threaded female port. The body is machined from brass, offering good corrosion resistance in a wide range of media. With a maximum working pressure of 3500 psi, this connector is suited for high-pressure instrumentation, hydraulic, and pneumatic plumbing lines. Licensed plumbers, pipefitters, and instrumentation technicians are the typical installers for this type of fitting.

This connector is used in residential and commercial installations wherever a compression tube line must transition to a female NPT port. Common applications include instrument tubing runs, pneumatic control lines, HVAC refrigerant and sensing lines, and hydraulic instrumentation circuits. The 1/8-27 thread size fits standard 1/8 inch NPT female ports. The compression end accepts compatible tubing for a ferrule-type bite-ring seal. Swagelok equivalent part number B-400-7-2 is noted in the supplier data for cross-reference.

Key Features

• Brass construction provides corrosion resistance across a broad range of fluids and gases
• Maximum working pressure of 3500 psi suitable for high-pressure instrumentation and pneumatic service
• Compression x FNPT end connections allow direct transition from tube to female NPT port
• 1/8-27 thread size mates with standard 1/8 inch NPT female fittings
• Compact, single-piece connector body simplifies installation in tight spaces

Compatibility

Cross-references to Swagelok part number B-400-7-2 as noted in supplier data. Designed as a standard compression-to-FNPT connector for instrumentation, pneumatic, and hydraulic tubing systems using 1/8-27 NPT female threaded ports.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or instrumentation technicians. Depressurize and isolate the line completely before removing any existing fitting or installing this connector. Use a calibrated tube cutter to ensure a square, clean tube end before seating the compression ferrule. Tighten the compression nut to the manufacturer-specified number of turns past finger-tight per standard compression fitting practice, and do not overtighten, as brass ferrules can distort and leak.