Parker 4 Fnz-b Compression Tube Plug Brass 3500 Psi

Product Description

The PARKER 4 FNZ-B is a brass compression tube plug designed to seal the end of a compression-style tubing line. It provides a secure, pressure-tight termination point for open tube ends in fluid or gas distribution systems. Rated to 3500 psi maximum working pressure and manufactured from ASME-SB75 and ASTM-B75 compliant brass, this plug is suited for systems where a reliable dead-end seal is required. With an overall length of 0.5 inches and a weight of 0.03 pounds, it is a compact, single-use termination fitting commonly installed by licensed plumbers, pipefitters, and HVAC technicians.

This compression tube plug is appropriate for residential and light commercial plumbing, pneumatic, and hydraulic tubing systems that use standard compression fittings. It terminates a tube run without requiring soldering or threading, making it suitable for retrofit work and service applications where a clean, removable seal is needed. It is a single-package quantity item with no minimum order beyond one unit.

Key Features

• Brass construction meets ASME-SB75 and ASTM-B75 standards
• Rated to 3500 psi maximum working pressure
• Compression end connection — no solder or thread required
• Compact 0.5 inch overall length for tight installation spaces
• Lightweight at 0.03 pounds — minimal added load on tubing systems

Compatibility

Designed as an OEM-style compression tube plug compatible with standard compression-style tubing fittings. Cross-references to Swagelok part number B-400-P.

Installation Notes

Installation is performed by a licensed plumber, pipefitter, or qualified HVAC technician. Depressurize and isolate the tubing system completely before installing or removing any compression fitting. Hand-tighten the plug onto the tube end, then apply the appropriate number of additional turns with a wrench per standard compression fitting practice — do not overtighten, as brass fittings can be damaged by excessive torque. Verify the system for leaks at operating pressure before returning to service.