Midland Industries 38077 Brass Nab Male Adapter 3/8x1/4

Product Description

The MIDLAND INDUSTRIES 38077 is a brass NAB male adapter fitting designed to connect 3/8-inch OD nylon tubing to a 1/4-inch male NPTF port. It is rated for SAE J844 Type A and B NT nylon tubing and is built for DOT air brake systems found on commercial vehicles and heavy-duty pneumatic circuits. The fitting carries a 150 psi working pressure rating and operates across a temperature range of -40 to 200 degrees F. Its 17/32-24 thread spec and all-brass construction make it a reliable choice for air brake line terminations and pneumatic panel connections. Licensed technicians and fleet service professionals are the primary installers.

This adapter is intended for use in DOT air brake nylon tubing assemblies, specifically where a tube OD connection transitions to a male NPTF threaded port. Typical applications include air brake supply lines, trailer pneumatic circuits, and compressed air plumbing on commercial vehicles and industrial equipment. It is compatible with SAE J844 Type A and B NT nylon tubing in 3/8-inch OD and connects to any 1/4-inch NPTF female-threaded port.

Key Features

• 3/8-inch tube OD inlet connects directly to SAE J844 Type A and B NT nylon tubing
• 1/4-inch male NPTF outlet threads into standard female NPTF ports
• 150 psi maximum working pressure for air brake service
• Operating temperature range of -40 to 200 degrees F
• 17/32-24 thread specification for DOT-compliant air brake fittings
• All-brass construction resists corrosion in pneumatic environments

Compatibility

Designed for use with SAE J844 Type A and B NT nylon tubing in DOT air brake nylon tubing assemblies connecting 3/8-inch OD tube to 1/4-inch female NPTF ports.

Installation Notes

Installation should be performed by qualified technicians familiar with DOT air brake system regulations and pneumatic plumbing. Depressurize the entire air brake system completely before removing or installing any fittings. Inspect the mating female NPTF port for thread damage before assembly and apply thread sealant appropriate for pneumatic service if required by the system. Do not overtighten; follow standard NPTF hand-tight-plus-turns assembly practice to avoid thread damage.