Eaton 900599-10S Steel Flared Tube Plug 5/8 in Od

Product Description

The EATON 900599-10S is a steel flared tube plug designed to seal hydraulic and fluid lines at a 37-degree flare connection. It uses a 7/8-14 SAE thread and fits a 5/8-inch tube OD. The plug is rated for working pressures up to 3000 psi and handles temperatures from -40 degrees F to 250 degrees F. It measures 1.1 inches in overall length and weighs 0.28 pounds. Hydraulic technicians, plumbers, and fluid-system mechanics install this fitting to cap off unused or temporary line ports during service, system modification, or pressure testing.

This tube plug suits hydraulic systems, pneumatic lines, and fluid-transfer plumbing where a 37-degree SAE flare end connection is the specified standard. It is commonly used in industrial, mobile equipment, and HVAC refrigerant line applications where a reliable, pressure-rated port cap is required. The SAE 070109 standard governs its design, making it a recognized specification fitting for OEM and aftermarket service work alike.

Key Features

• 37-degree flare end connection seals SAE-standard flared tube ports
• 7/8-14 SAE thread for secure, leak-resistant engagement
• Rated to 3000 psi maximum working pressure
• Temperature range of -40 degrees F to 250 degrees F suits a wide range of fluid systems
• Steel construction provides durability in high-pressure hydraulic environments
• Compact 1.1-inch overall length for use in tight plumbing configurations

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic and fluid systems using 37-degree SAE flare connections with a 5/8-inch tube OD and 7/8-14 thread size.

Installation Notes

Installation is performed by qualified hydraulic or plumbing technicians. Depressurize and bleed the system fully before removing any existing fittings or installing this plug. Use appropriate wrenches sized to the fitting hex to avoid rounding; do not use pipe wrenches on flare fittings. Verify thread engagement and inspect the flare seat for damage before torquing to system specifications per the applicable SAE or equipment service manual.