Midland Industries 540568 Steel Pipe Expander Adapter

Product Description

The MIDLAND INDUSTRIES 540568 is a steel pipe expander adapter designed to connect a 3/8-inch male NPTF thread to a 1/2-inch female NPTF thread in hydraulic and high-pressure piping systems. It steps up from the smaller male end to the larger female port, making it a standard expander-style adapter. Rated to 3000 psi maximum operating pressure and suitable for service up to 375 degrees F, this fitting is built for demanding hydraulic and fluid transfer applications. Licensed plumbers, pipefitters, and hydraulic system technicians install this fitting where a pipe or hose assembly requires a thread-size transition between NPTF connections.

This adapter is suited for use in hydraulic power units, industrial fluid systems, and high-pressure plumbing assemblies where an expander transition between 3/8-inch and 1/2-inch NPTF ports is required. The NPTF thread form provides a dry-seal connection that minimizes the need for additional thread sealant, making it appropriate for clean hydraulic and pneumatic circuits in residential, commercial, and light industrial settings.

Key Features

• Expander configuration: 3/8-inch Male NPTF to 1/2-inch Female NPTF for thread-size transitions
• Maximum operating pressure of 3000 psi for high-pressure hydraulic service
• Rated for operating temperatures up to 375 degrees F
• NPTF dry-seal thread form on both ends reduces leakage risk without relying solely on sealant
• Solid steel construction for durability in hydraulic and fluid power environments
• Compact profile: 1.65 inches wide, 1.2 inches in length, 1.1 inches in height

Compatibility

Designed as an OEM-style replacement or new-installation fitting for hydraulic and high-pressure piping systems requiring a 3/8-inch Male NPTF to 1/2-inch Female NPTF expander connection rated to 3000 psi.

Installation Notes

Installation should be performed by a licensed pipefitter, plumber, or qualified hydraulic technician. Depressurize and isolate the hydraulic or fluid system completely before removing or installing any fittings. Apply thread sealant or PTFE tape as appropriate for the fluid media, even with NPTF dry-seal threads, when system requirements call for it. Follow applicable local codes and industry standards for hydraulic piping assembly and pressure testing.