Parker 4 Bl-s Tube Support 9/16-18 Unf Orfs Steel

Product Description

The PARKER 4 BL-S is a compression tube support fitting designed to reinforce tubing at threaded connection points and prevent deformation under mechanical stress. Constructed from steel, this fitting uses an O-Ring Face Seal (ORFS) end connection with a 9/16-18 UNF thread. It is designed for use in high-pressure fluid and pneumatic systems where tube wall integrity at the fitting junction is critical. HVAC technicians, plumbers, and fluid system installers use tube supports to maintain tube roundness and reduce the risk of leakage at compression joints. The 1/4-inch outside diameter tube compatibility makes it suited for small-bore line applications in refrigeration, hydraulic, and related trade systems.

This tube support is applied in residential and commercial installations where 1/4-inch OD tubing connects to ORFS-ported components. Typical scenarios include refrigeration line sets, hydraulic control circuits, and instrumentation tubing runs where vibration or torque loading could otherwise compromise the compression seat. The 9/16-18 UNF thread standard ensures compatibility with standard ORFS fittings used across HVAC, hydraulic, and fluid power assemblies. It is sold individually with a minimum order quantity of 5 units.

Key Features

• Steel construction provides durability in high-pressure and vibration-prone installations
• ORFS end connection minimizes leakage risk with a face seal design
• 9/16-18 UNF thread conforms to standard unified fine thread specifications
• Supports 1/4-inch OD tubing to maintain tube geometry at the compression joint
• Compact and lightweight at 0.04 pounds, suitable for tight installation spaces

Compatibility

Designed as an OEM-style replacement and standard fitment tube support for compression fitting assemblies using 1/4-inch OD tubing with 9/16-18 UNF ORFS threaded connections.

Installation Notes

Installation should be performed by a licensed HVAC technician, plumber, or qualified fluid systems mechanic. De-pressurize and isolate the line before disassembling any compression fitting. Ensure tube ends are cut cleanly and deburred before seating the tube support to avoid damaging the O-ring face seal surface. Refer to applicable system codes and the fitting manufacturer torque guidelines for final assembly.