Eaton 2021-4-8S Steel Flared Tube Connector 1/2 in Od

Product Description

The EATON 2021-4-8S is a steel flared tube connector designed to join tubing to a male NPT threaded port in high-pressure fluid and pneumatic systems. It features a 37-degree flare seat on the tube end and a male NPT threaded end on the opposite side, providing a reliable metal-to-metal seal. The connector accommodates a 1/2-inch tube OD with a 0.28-inch inside diameter and measures 1.53 inches in overall length. Rated to 6000 psi maximum working pressure, it is built for demanding hydraulic and instrumentation applications where leak-free connections are critical. Licensed plumbers, pipefitters, and hydraulic system technicians are the primary installers.

This connector is suited for residential and commercial hydraulic lines, instrumentation tubing, and fluid power systems operating across a wide temperature range of -40 to 250 degrees F. It is commonly installed where a tubing run must terminate at a threaded port on a valve, manifold, pump, or cylinder. The SAE J514 (SAE 070102) standard compliance makes it appropriate for mobile equipment, industrial machinery, and process piping applications requiring a secure flare-to-pipe transition.

Key Features

• 37-degree flare seat provides a positive metal-to-metal seal without additional sealant on the flare
• 6000 psi maximum working pressure rated for high-pressure hydraulic service
• Flare x MNPT end configuration transitions tubing to NPT-threaded ports
• Wide service temperature range from -40 to 250 degrees F
• SAE 070102 standard compliance for verified dimensional and performance consistency
• Steel construction for durability in demanding industrial and fluid power environments

Compatibility

Designed as an OEM-style replacement or new-installation fitting for hydraulic and instrumentation tubing systems using 1/2-inch OD tubing with a 37-degree flare and 1/4-inch NPT threaded port connections.

Installation Notes

Installation should be performed by a licensed pipefitter, plumber, or qualified hydraulic technician following applicable codes such as the IPC or relevant SAE standards. Depressurize and isolate the hydraulic or fluid system completely before removing or installing any fittings. Inspect the tubing flare for concentricity and surface defects before assembly, as an imperfect flare is the leading cause of joint leakage. Do not overtighten; follow torque guidelines published in SAE J514 for the applicable tube size and material.