Parker 6 Bl-s Tube Support 3/8 in Od Orfs 11/16-16 Unf

Product Description

The PARKER 6 BL-S is a compression tube support fitting designed to reinforce tubing at threaded connection points in hydraulic and fluid-transfer assemblies. Machined from steel, it fits 3/8 inch outside diameter tubing and uses an 11/16-16 UNF thread with an O-Ring Face Seal (ORFS) end connection. The ORFS interface provides a leak-free metal-to-metal seat backed by an O-ring, making it well suited for high-pressure hydraulic lines. This type of fitting is installed by hydraulic technicians, pipefitters, and fluid-power specialists working on mobile equipment, industrial machinery, and stationary hydraulic power units.

This tube support is used wherever 3/8 inch OD tubing requires additional structural reinforcement at a threaded port or bulkhead connection. Typical applications include hydraulic plumbing on construction equipment, agricultural machinery, and industrial presses where vibration or side-loading could fatigue the tube wall at the fitting junction. ORFS connections are common in systems requiring zero-leak performance under cyclic pressure conditions. The steel construction handles the mechanical stress found in these environments without deforming under normal torque loading.

Key Features

• Supports 3/8 inch outside diameter tubing at the compression fitting connection point
• 11/16-16 UNF thread size for precise thread engagement
• O-Ring Face Seal (ORFS) end connection for leak-free performance under pressure
• Steel construction provides durability in high-vibration hydraulic environments
• Compact, single-piece design with no loose components

Compatibility

Designed as an OEM-style replacement or new-installation tube support for hydraulic and fluid-transfer systems using 3/8 inch OD tubing with ORFS-ported fittings and 11/16-16 UNF threaded connections.

Installation Notes

Installation is performed by qualified hydraulic technicians or pipefitters. Depressurize and drain the hydraulic circuit fully before removing or installing any fitting. Inspect the O-ring seating surface for nicks or contamination before assembly, as surface damage will compromise the ORFS seal. Follow the fitting manufacturer torque guidelines and applicable fluid-power standards; do not over-tighten, as this can damage the O-ring or distort the tube support.