Brennan KP4311 Compression Front Ferrule 3/8 in Ss

Product Description

The BRENNAN KP4311 is a stainless steel compression tube front ferrule designed for use in compression fitting assemblies. The front ferrule seats between the compression nut and the tube, creating a leak-tight mechanical seal when the fitting is tightened. Manufactured from stainless steel, this ferrule provides corrosion resistance suitable for demanding fluid and gas handling applications. It is compatible with 3/8-inch outside diameter tubing and is sold in a package of 5 pieces, making it practical for service technicians and installers who routinely stock compression fitting components.

This front ferrule is used in compression-style tube connections found in HVAC, plumbing, instrumentation, and industrial process piping systems. It is suited for both residential and light commercial applications where a reliable, reusable tube fitting is required. The ferrule cross-references to Swagelok part number SS-603-1, making it a recognized replacement option in instrumentation and fluid system work where Swagelok-style compression hardware is specified.

Key Features

• Stainless steel construction for corrosion resistance in wet, chemical, and outdoor environments
• Fits 3/8-inch outside diameter tubing for precise compression sealing
• Front ferrule design creates a positive, leak-tight seat when compressed against the fitting body
• Cross-references to Swagelok part number SS-603-1
• Sold in a package of 5 pieces to support service kit stocking

Compatibility

Designed for use with compression fitting assemblies accepting a 3/8-inch outside diameter tube front ferrule. Cross-references to Swagelok part number SS-603-1 for direct replacement use in compatible compression fitting systems.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or instrumentation technicians. Shut off all pressure to the line and depressurize the system before disassembling any compression fitting. Seat the front ferrule squarely on the tube before threading the compression nut to avoid cocking or improper sealing. Do not reuse a ferrule that has been fully swaged onto tubing, as reshaping a compressed ferrule will compromise the seal integrity.