Parker 4-4 F6L-S Swivel Connector 1/4-18 Orfs Nptf Steel

Product Description

The PARKER 4-4 F6L-S is a compression tube pipe thread swivel connector designed for high-pressure fluid line connections in hydraulic and pneumatic systems. It features an O-Ring Face Seal (ORFS) end on one side and a 1/4-18 NPTF pipe thread on the other, with a maximum working pressure rating of 6000 psi. The steel construction provides durability in demanding industrial and mobile equipment environments. The swivel design allows the fitting to rotate during installation, simplifying assembly and reducing the risk of line twist in tight or congested plumbing layouts. Hydraulic technicians and pipefitters are the primary installers of this fitting type.

This connector is suited for use in hydraulic fluid lines, lubrication systems, and high-pressure pneumatic circuits where a leak-free transition between compression tube and pipe thread connections is required. The ORFS end provides a metal-to-metal seal backed by an O-ring, making it effective in vibration-prone installations. The NPTF thread side creates a pressure-tight joint without the need for additional sealant tape when properly torqued. Typical applications include mobile hydraulics, industrial machinery, and high-pressure test equipment.

Key Features

• ORFS x NPTF end connections for leak-free tube-to-pipe transitions
• 1/4-18 NPTF thread size for standard pipe thread fitment
• 6000 psi maximum working pressure rating
• Steel construction for strength in high-pressure service
• Swivel design reduces line twist during assembly

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic and high-pressure fluid systems requiring a 1/4-18 NPTF pipe thread connection with an O-Ring Face Seal tube end.

Installation Notes

Installation should be performed by a qualified hydraulic technician or pipefitter familiar with ORFS and NPTF fitting procedures. Depressurize and isolate the hydraulic or fluid circuit completely before disassembly or installation. Inspect the O-ring sealing surface for damage before assembly and replace the O-ring if any nicks or deformation are present. NPTF threads are designed to seal on the thread form itself, but verify joint integrity under system pressure before returning the line to service.