Midland Industries 640014 Male Jic X Male O-ring Boss Adapter

Product Description

The MIDLAND INDUSTRIES 640014 is a steel hydraulic adapter fitting designed to connect a 7/8-inch Male JIC end to a 7/8-inch Male O-Ring Boss (ORB) port. It carries a 1-3/16-12 thread specification and is rated for working pressures up to 2,300 psi with a non-adjustable proof pressure of 2,900 psi. The operating temperature range extends to 375 degrees F, making it suitable for high-pressure hydraulic lines in demanding industrial and mobile equipment applications. Hydraulic technicians and pipefitters install this adapter when transitioning between JIC and ORB port configurations without modifying existing hardware.

This adapter fits into the 6400 Series Male JIC to Male O-Ring Boss product line and is intended for steel hydraulic systems where a straight inline connection is needed between a JIC 37-degree flare fitting and an O-Ring Boss port. Typical installations include mobile hydraulic equipment, industrial machinery, and fluid power systems that require leak-resistant ORB port connections paired with standard JIC tube end assemblies. Its compact profile suits tight plumbing runs where space is limited.

Key Features

• 2,300 psi maximum working pressure with 2,900 psi non-adjustable proof pressure rating
• 375 degrees F maximum operating temperature for high-temperature hydraulic service
• 1-3/16-12 thread specification for precise, secure engagement
• Steel construction for durability in high-pressure hydraulic environments
• Inline Male JIC to Male O-Ring Boss configuration for direct port transitions

Compatibility

Designed as an OEM-style replacement or new-installation fitting for steel hydraulic systems using 7/8-inch Male JIC and 7/8-inch Male O-Ring Boss connections in the 6400 Series Steel JIC Adapter family.

Installation Notes

Installation should be performed by a qualified hydraulic technician or pipefitter familiar with high-pressure fluid power systems. Depressurize and bleed the hydraulic system fully before removing or installing any fittings. Inspect O-ring seals and JIC flare seats for damage prior to assembly, and verify thread engagement is clean and free of debris. Follow applicable industry standards for hydraulic fitting assembly and torque procedures.