Parker BD-KP4433 Compression Tube Ferrule 3/8 in Ss

Product Description

The PARKER BD-KP4433 is a compression tube ferrule designed for use in compression-style tube fittings with a 3/8 inch tube outside diameter. Constructed from stainless steel, this ferrule seats against the fitting body and nut to create a leak-resistant mechanical seal when the compression fitting is tightened. It is a standard component in fluid and gas distribution assemblies across HVAC, plumbing, pneumatic, and industrial piping systems. Licensed plumbers, HVAC technicians, and pipefitters install this type of ferrule as part of routine compression fitting assembly or replacement. Each package contains 5 ferrules.

This ferrule is suited for residential and light commercial applications where compression fittings are used to join copper, stainless, or compatible tubing without soldering or brazing. Typical install scenarios include refrigerant line accessories, instrument tubing, hydraulic lines, and potable water supply connections. It is sized for 3/8 inch tube OD and is sold in a package quantity of 5, making it practical for service calls requiring multiple fitting connections or on-hand spares.

Key Features

• Stainless steel construction resists corrosion in wet and chemically active environments
• Sized for 3/8 inch tube outside diameter compression fittings
• Compression end connection type — no soldering, brazing, or special tooling required for assembly
• Sold in a package of 5 ferrules per order unit
• UNSPSC Code 27121700 for procurement and catalog classification

Compatibility

Designed for use with standard compression-style tube fittings accepting a 3/8 inch tube outside diameter. Suitable for use in systems where stainless steel ferrules are specified for corrosion resistance or fluid compatibility requirements.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or pipefitters following applicable IPC or IFGC guidelines for the system type. Shut off and depressurize the line before disassembling any compression fitting. Do not reuse a previously compressed ferrule, as deformation from prior installation compromises the seal. Tighten the compression nut to the fitting manufacturer's specified engagement — do not overtighten, as this can crack or distort the ferrule.