Brennan KP4307 Compression Back Ferrule 3/8 in Ss

Product Description

The BRENNAN KP4307 is a stainless steel compression tube back ferrule with a compression cap end connection. Back ferrules are the rear-seating component in a two-ferrule compression fitting assembly. They work in tandem with a front ferrule to create a leak-tight, vibration-resistant seal on tubing outside diameters. This part is used in instrumentation, process, and fluid-handling systems where reliable tube connections are required. Installation is performed by licensed plumbers, pipefitters, and instrumentation technicians working on compression-style tubing assemblies.

This back ferrule is designed for 3/8 inch tube outside diameter applications using compression cap end connections. It is commonly installed in industrial instrumentation lines, HVAC refrigerant or control tubing, and process fluid systems where stainless steel corrosion resistance is required. Each package contains 5 pieces, making it suitable for multi-point installations or stocking as a service component. It corresponds to Swagelok part number SS-604-1 for cross-reference purposes.

Key Features

• Stainless steel construction provides corrosion resistance in demanding fluid and gas service environments
• Fits 3/8 inch tube outside diameter compression assemblies
• Compression cap end connection for use in standard two-ferrule fitting systems
• Cross-references to Swagelok part number SS-604-1
• Sold in packages of 5 pieces for multi-point or stocking applications

Compatibility

Designed as a replacement or service component for two-ferrule compression fitting assemblies using 3/8 inch tube outside diameter tubing. Cross-references to Swagelok SS-604-1.

Installation Notes

Back ferrules are installed by qualified pipefitters, plumbers, or instrumentation technicians. Always depressurize and isolate the tubing circuit before disassembling or reassembling compression fittings. Follow the fitting manufacturer torque and turns-of-nut procedure for proper ferrule seating. Reusing previously swaged ferrules is not recommended on critical service lines.