Midland Industries 680806C Dot Male Connector Ptc X Npt

Product Description

The MIDLAND INDUSTRIES 680806C is a D.O.T.-compliant composite male connector designed for pneumatic tubing systems in commercial and vocational truck applications. It joins a 1/2-inch push-to-connect port to a 3/8-inch male NPT port, allowing quick, tool-free tube insertion on one end and a threaded port connection on the other. The composite body construction keeps weight low while maintaining a rated working pressure of 145 psi across a wide temperature range of -40 to 140 degrees F. This fitting is a standard choice for air brake and pneumatic control plumbing where D.O.T. compliance is required.

This connector is used in air brake system plumbing, pneumatic chassis lines, and compressed-air control circuits on commercial trucks, trailers, and heavy equipment. It suits new installations and replacement work where a push-to-connect-to-NPT transition is needed. The 3/8-18 NPT thread mates to standard port bosses on valves, tanks, and manifolds. Installation is handled by fleet technicians, diesel mechanics, and licensed air brake service technicians working under D.O.T. guidelines.

Key Features

• D.O.T.-compliant composite body rated for air brake and pneumatic service
• 1/2-inch push-to-connect inlet accepts tubing without additional tools
• 3/8-inch male NPT outlet with 3/8-18 thread for standard port connections
• 145 psi working pressure rating
• Operating temperature range of -40 to 140 degrees F suits under-hood and chassis environments
• Compact profile at approximately 1.2 inches height and 0.9 inches length

Compatibility

Designed as a D.O.T.-compliant OEM-style replacement or new-installation fitting for 1/2-inch push-to-connect pneumatic tubing systems transitioning to 3/8-inch male NPT ports on commercial vehicles and trailers.

Installation Notes

Installation should be performed by a qualified technician familiar with D.O.T. air brake regulations and federal motor vehicle safety standards. Depressurize the air system completely before removing or installing any pneumatic fitting. Ensure the NPT threads are sealed with an appropriate thread sealant compatible with air service, and do not over-tighten the threaded connection. Verify that the push-to-connect tubing is cut clean and square before insertion to ensure a proper seal.