Parker 6-1/4 F5OG-S Pipe Adapter 6000 Psi 9/16-18 Male Nptf

Product Description

The PARKER 6-1/4 F5OG-S is a straight hydraulic pipe adapter designed to connect a 9/16-18 male straight thread O-ring port to a 1/4-inch female NPTF port in high-pressure fluid systems. Built from zinc-plated steel, it carries a maximum working pressure rating of 6,000 psi, making it suitable for demanding hydraulic and industrial plumbing circuits. The fitting measures 1.1875 inches in overall length with a 0.75-inch hex for standard wrench installation. It is sized and configured for single-unit replacement or service use by hydraulic system technicians and industrial maintenance professionals.

This adapter is used in hydraulic power units, mobile equipment, industrial machinery, and high-pressure fluid circuits where a male straight thread O-ring (ORFS-style port) must transition to a female NPTF connection. The straight body style suits tight inline installations where a bulky angled fitting is not practical. It conforms to SAE 090156 standards, which governs dimensional and pressure performance for this fitting classification. Installation is typically performed by hydraulic technicians or industrial pipefitters working on pressurized fluid systems.

Key Features

• 6,000 psi maximum working pressure for high-pressure hydraulic service
• Male straight thread O-ring x female NPTF connection eliminates thread-sealing compound on the male side
• Zinc-plated steel construction provides corrosion resistance in industrial environments
• Straight fitting shape supports compact inline routing
• 0.75-inch hex allows standard open-end or combination wrench installation
• Meets SAE 090156 dimensional and performance standards

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic and industrial fluid systems requiring a male straight thread O-ring to female NPTF adapter in the 9/16-18 and 1/4-inch thread sizes.

Installation Notes

Depressurize and bleed the hydraulic system completely before removing or installing any fittings. The male straight thread O-ring end relies on the O-ring face seal for leak-free connection — inspect the O-ring for damage before assembly and do not overtighten. Apply thread sealant only to the female NPTF side as required by system specifications. This fitting should be installed by a qualified hydraulic technician or industrial pipefitter familiar with high-pressure fluid system service procedures.