QD-INDMC-4M - 1/4 Inch Industrial Air Coupler Male NPT Manual Connect

Reliable Pneumatic Connection for Industrial Applications

The Pneumatic Air Coupler 1/4" x 1/4" MNPT Manual is a fundamental component for any industrial or workshop air distribution system. Designed to meet the rigorous demands of daily use, this coupler features a standard Industrial Interchange (Type M) profile, making it universally compatible with one of the most widely used plug styles in the industry. The unit is constructed from high-quality brass, offering excellent resistance to corrosion and mechanical wear, which is essential for maintaining seal integrity over time.

Technical Specifications and Design

This coupler utilizes a 1/4-inch body size, which is the standard for general-purpose shop air lines, balancing flow rate with compact size. The inlet features 1/4-inch Male NPT (National Pipe Taper) threads, allowing for direct installation onto manifolds, hard piping, or hose ends that require a male connection. The internal mechanism employs a ball-locking system that securely grips the mating plug. As a manual coupler, the user must retract the sleeve to insert or remove the plug, a design that ensures a positive connection is made before airflow is engaged and prevents accidental disconnection if the hose is snagged.

Performance and Durability

Engineered for standard shop pressures, typically up to 300 PSI, this coupler maintains a tight seal to prevent air leaks that can reduce tool efficiency and increase compressor load. The knurled sleeve provides tactile feedback and grip, facilitating operation even when wearing work gloves or when hands are oily. Whether used for assembly lines, automotive repair, or general maintenance, this coupler delivers consistent performance and reliability.

Installation and Compatibility

Installation is straightforward using standard wrenches. The NPT threads require a suitable sealant, such as PTFE tape or pipe dope, to ensure a leak-free joint. Its compatibility with Type M plugs ensures that it can be integrated into existing air networks without the need for proprietary adapters, streamlining inventory and maintenance for facility managers.