Parker BD-KP4491 Brass Compression Ferrule 1/4 Inch Od 10pk

Product Description

The PARKER BD-KP4491 is a brass compression tube ferrule designed to create a leak-tight mechanical seal in compression-style tube fittings. The ferrule seats against the fitting body as the compression nut is tightened, biting into the outer diameter of the tubing to hold pressure and prevent leakage. Sized for 1/4-inch outside diameter tubing, this ferrule is constructed from brass, making it suitable for a wide range of fluid and gas line applications. Sold in a pack of 10, it is a standard consumable stocked by plumbers, HVAC technicians, and pipefitters for routine service and new installations.

This ferrule is used in compression fittings on copper, brass, and compatible soft-metal tubing with a 1/4-inch outside diameter. Typical applications include refrigerant-side instrumentation lines, pneumatic control tubing, fuel gas pilot lines, water supply connections, and instrumentation tubing runs in both residential and light commercial systems. It is a direct-use component in any compression fitting assembly that calls for a separate ferrule rather than a captured or pre-installed design.

Key Features

• Brass construction provides corrosion resistance and reliable deformation characteristics for a secure compression seal
• Sized for 1/4-inch outside diameter tubing to match standard compression fitting bodies
• Compatible with common compression nut and fitting body assemblies used in plumbing, HVAC, and instrumentation
• Sold in a pack of 10 for convenient stocking and repetitive service work
• Fitting type classification 4720 per Product Service Code, aligning with hose, pipe, and tube fittings

Compatibility

Designed as an OEM-style replacement ferrule for standard compression tube fitting assemblies using 1/4-inch outside diameter tubing. Confirm fitting body and compression nut specifications before installation to ensure proper seating and sealing.

Installation Notes

Compression ferrules are installed by licensed plumbers, HVAC technicians, and pipefitters working on pressurized tube and pipe systems. Before servicing any compression fitting, isolate and depressurize the line and shut off all fluid or gas supply upstream of the connection point. Do not over-tighten the compression nut, as excess torque can deform the ferrule beyond its seating geometry and compromise the seal. Follow applicable code references such as IFGC for gas line work or IPC for potable water systems when selecting ferrule and fitting materials.