Brennan KP4309 Compression Front Ferrule 1/8 in

Product Description

The BRENNAN KP4309 is a stainless steel compression front ferrule designed for use in compression tube fittings with a 1/8 inch tube outside diameter. The front ferrule is the primary sealing component in a two-ferrule compression assembly, biting into the tube wall when the fitting nut is tightened to create a leak-tight connection. This part is sold in a package quantity of five. It is typically installed by licensed plumbers, HVAC technicians, and instrumentation technicians working on tubing systems that require reliable, vibration-resistant connections.

This front ferrule is suited for residential and commercial applications involving compression-style tube fittings in fluid or gas handling systems. Common use cases include instrument tubing, pneumatic control lines, refrigeration sensing lines, and hydraulic or process piping where a 1/8 inch OD tube is used with a standard two-ferrule compression fitting body. The stainless steel construction makes it appropriate for corrosive or high-purity environments.

Key Features

• Stainless steel construction for corrosion resistance in demanding environments
• Designed for 1/8 inch tube outside diameter compression assemblies
• Functions as the primary sealing ferrule in a two-ferrule compression fitting system
• Sold in a package of 5 pieces, with a minimum order quantity of 1 package
• Cross-references Swagelok part number SS-203-1

Compatibility

Compatible with standard two-ferrule compression fitting bodies accepting a 1/8 inch tube outside diameter. Cross-references Swagelok part number SS-203-1. Designed as an OEM-style replacement front ferrule for compression tube fitting assemblies.

Installation Notes

Compression front ferrules are installed by qualified plumbers or instrumentation technicians familiar with tubing system assembly. Always depressurize and isolate the tubing circuit before disassembling any compression fitting. Do not overtighten the fitting nut, as this can deform the ferrule and compromise the seal. Follow the fitting manufacturer's recommended installation procedure for proper ferrule seating and pull-up turns.