Parker 3 Fnz-b Compression Tube Plug Brass 3500 Psi

Product Description

The PARKER 3 FNZ-B is a brass compression tube plug designed to seal the end of a compression-style tubing line. It terminates an open tube end without requiring welding, soldering, or threaded fittings. Built from brass conforming to ASME-SB75 and ASTM-B75 standards, this plug handles a maximum working pressure of 3500 psi and measures 0.47 inches in overall length. It is suited for use in instrumentation, hydraulic, pneumatic, and fluid control systems where a leak-free end closure is required. Installation is handled by licensed plumbers, pipefitters, and instrumentation technicians working with compression-style tube fittings.

This plug is a compact, single-piece fitting used in applications where a tube run must be capped off cleanly. Common install scenarios include instrumentation panels, process control lines, test manifolds, and hydraulic circuits using compression tubing. Its small footprint and straightforward ferrule-and-nut compression design make it practical for tight-space terminations in both industrial and commercial settings. The brass construction makes it compatible with a broad range of media including water, air, oil, and many hydraulic fluids.

Key Features

• Brass construction meets ASME-SB75 and ASTM-B75 material standards
• Maximum working pressure of 3500 psi for demanding fluid and pneumatic systems
• Compression end connection for tool-assisted, no-solder installation
• Compact overall length of 0.47 inches for use in space-constrained assemblies
• Single-piece plug design provides a clean, leak-free tube termination

Compatibility

Designed as an OEM-style compression tube plug for use in compression fitting systems. Cross-references to Swagelok part number B-300-P per supplier data.

Installation Notes

Installation should be performed by a qualified pipefitter, plumber, or instrumentation technician familiar with compression fitting assemblies. Depressurize and isolate the tubing line completely before removing any existing fittings or installing this plug. Use appropriate tube wrenches or open-end wrenches to tighten the compression nut to the fitting body; follow the fitting manufacturer's assembly procedure for turn count after finger-tight. Do not overtighten, as brass compression components can be damaged by excessive torque.