Eaton 2018-12-12S Female Jic 37 to Male Npt Adapter 3/4 in

Product Description

The EATON 2018-12-12S is a steel flared tube adapter designed to transition a female JIC 37-degree swivel connection to a male NPT pipe thread. Built for hydraulic and fluid power plumbing, this fitting accommodates a 3/4 inch tube OD on the flare side and a 3/4 inch NPT thread on the pipe side. It is rated for a maximum working pressure of 5500 psi and handles temperatures from -40 degrees F to 250 degrees F. The swivel design on the JIC end allows for easier alignment during installation without twisting the connected tube. Manufactured to SAE J514 standards, it suits demanding fluid line applications in industrial, mobile hydraulic, and heavy equipment environments.

This adapter is used wherever a JIC 37-degree flare tube line must connect to an NPT-threaded port or fitting. Typical applications include hydraulic systems, fluid power assemblies, and high-pressure plumbing on mobile equipment, machine tools, and industrial machinery. The 3/4 inch sizing makes it a common choice for mid-flow hydraulic circuits. Licensed pipefitters, hydraulic technicians, and fluid power specialists install this fitting in both OEM assembly and field service contexts.

Key Features

• Female JIC 37-degree swivel inlet to male NPT outlet — bridges two common thread standards in one body
• Rated to 5500 psi maximum working pressure for high-pressure hydraulic service
• Operating temperature range of -40 degrees F to 250 degrees F
• Steel construction for durability in hydraulic and fluid power environments
• Manufactured to SAE J514 for dimensional and performance compliance
• Swivel end allows rotational alignment without stressing the tube during installation

Compatibility

Designed as an OEM-style replacement or service fitting for hydraulic and fluid power plumbing systems using 3/4 inch JIC 37-degree flare tube connections mated to 3/4 inch NPT-threaded ports, conforming to SAE J514.

Installation Notes

Installation should be performed by a qualified hydraulic technician or licensed pipefitter. Depressurize and drain the hydraulic circuit fully before removing or installing any fittings. Apply thread sealant only to the NPT male threads — never apply sealant to the JIC flare seating surface, as the metal-to-metal flare cone provides the seal. Torque to the fitting manufacturer or system designer specifications and verify there are no leaks before returning the system to service.