Parker 4 Flo-s Compression Tube Connector 1/4 in Orfs Nptf

Product Description

The PARKER 4 FLO-S is a compression tube connector designed to join a 1/4-inch outside diameter tube to a 1/8-27 NPTF port using an O-Ring Face Seal (ORFS) interface on the tube end. Constructed from zinc-plated steel, this fitting delivers a rated maximum working pressure of 6000 psi, making it appropriate for demanding hydraulic and fluid power circuits. The ORFS end provides a leak-resistant metal-to-metal face seal backed by an O-ring, while the NPTF thread creates a pressure-tight connection without sealant tape in most applications. Licensed plumbers, hydraulic technicians, and fluid power specialists install this type of fitting in industrial and mobile equipment lines.

This connector is suited for hydraulic lines, pneumatic systems, and instrumentation tubing where a reliable transition between compression tube and threaded port connections is required. The 1/8-27 NPTF thread size is common on manifolds, valve bodies, pumps, and cylinders in both mobile and stationary hydraulic equipment. Zinc plating provides baseline corrosion resistance for moderate-duty service environments. The compact single-piece body keeps the fitting count low in tight plumbing layouts.

Key Features

• ORFS x NPTF end connections — compatible with standard O-ring face seal ports and 1/8-27 tapered pipe threads
• 6000 psi maximum working pressure rated for high-pressure hydraulic service
• 1/4-inch tube outside diameter compression fitting end
• Zinc-plated steel construction for strength and moderate corrosion resistance
• Single-piece connector body minimizes potential leak points

Compatibility

Designed as an OEM-style compression tube connector for hydraulic and fluid power systems requiring a 1/4-inch OD tube to 1/8-27 NPTF port transition with an ORFS sealing interface.

Installation Notes

Installation should be performed by a qualified hydraulic technician or licensed plumber following applicable fluid power safety standards. Depressurize and lock out the hydraulic system completely before removing or installing any fittings. Inspect the ORFS sealing face and O-ring for damage before assembly; a nicked face seal or cut O-ring will result in leakage under pressure. Verify thread engagement and do not overtighten, as overtorquing a compression fitting can deform the ferrule or fitting body.