Eaton 1290-10S Steel Flared Tube Nut 5/8 in Od 7/8-14 Sae

Product Description

The EATON 1290-10S is a 3-piece steel flared tube nut designed for use in hydraulic and fluid-conveying line assemblies. It connects to tubing with a 5/8 inch outside diameter using a 37-degree flare end connection and a 7/8-14 SAE-threaded interface. Rated to 3000 psi maximum working pressure, this fitting is suited for demanding pressure applications where leak-free sealing at flared tube joints is required. The steel construction provides durability in industrial and mobile hydraulic environments. It is installed by hydraulic system technicians, equipment mechanics, and plumbing professionals working on high-pressure fluid lines.

This tube nut is used in hydraulic, pneumatic, and high-pressure fluid systems where SAE 37-degree flare fittings are the specified connection standard. Typical applications include mobile equipment hydraulics, industrial machinery fluid lines, and fabricated tube assemblies requiring a reliable mechanical flare seal. Its SAE thread standard makes it broadly compatible with SAE J514 flare fitting systems found across OEM and aftermarket hydraulic assemblies. Single-piece packaging makes it suitable for repair, replacement, or low-volume fabrication work.

Key Features

• 37-degree flare end connection conforms to SAE 070110 standards
• 7/8-14 SAE thread for secure, standardized mating
• 3000 psi maximum working pressure rating
• 5/8 inch tube outside diameter fitment
• 0.97 inch overall length fits compact tube assembly layouts
• Steel construction for strength and durability in hydraulic service

Compatibility

Designed as an OEM-style replacement or new-installation component for hydraulic and fluid-line tube assemblies using SAE 37-degree flare fittings with a 5/8 inch tube OD and 7/8-14 SAE threads.

Installation Notes

Installation is performed by qualified hydraulic technicians or mechanics. Depressurize and bleed down the hydraulic system fully before disconnecting or replacing any fittings. Inspect the tube flare for cracks, ovality, or surface defects before assembly, as a damaged flare will prevent a proper seal. Torque the tube nut according to the applicable SAE J514 specification for the fitting size; do not over-tighten, as this can deform the flare and cause leaks.