Parker 4050-15 Hydraulic Ball O-ring Boss Coupler 3000 Psi

Product Description

The PARKER 4050-15 is a hydraulic hose ball O-ring boss (ORB) coupler designed for high-pressure fluid connections in hydraulic systems. Manufactured from steel with an SAE shaft configuration, it features a 3/4-16 thread size and a 1/2 inch body diameter. Rated to 3,000 psi working pressure, this fitting provides a leak-resistant seal at the boss port by compressing an O-ring against the port face. It is installed by hydraulic technicians and fluid power mechanics on industrial, mobile, and equipment-mounted hydraulic circuits where a reliable, metal-to-metal-backed O-ring seal is required.

This coupler is suited for use in both mobile and stationary hydraulic applications including construction equipment, agricultural machinery, industrial hydraulic power units, and similar systems that use SAE straight-thread O-ring boss ports. The 3/4-16 thread and 1/2 inch body diameter make it appropriate for medium-bore hydraulic hose assemblies operating at or below the 3,000 psi pressure rating. It is a single-piece fitting sold individually.

Key Features

• 3,000 psi working pressure rating for demanding hydraulic service
• Ball O-ring boss design provides a positive, leak-resistant seal at the port face
• 3/4-16 SAE straight thread for precise engagement and torque retention
• 1/2 inch body diameter for compatibility with medium-bore hose assemblies
• Steel construction for strength and durability in hydraulic environments

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic systems using SAE straight-thread O-ring boss ports with a 3/4-16 thread size.

Installation Notes

Installation should be performed by a qualified hydraulic technician or fluid power mechanic. Depressurize and isolate the hydraulic circuit completely before removing or installing any fittings. Inspect the O-ring for damage before assembly and lubricate it lightly with clean hydraulic fluid prior to installation. Torque to the system manufacturer or SAE standard specifications for the thread size — do not overtighten, as this can damage the O-ring and compromise the seal.