A Hydraulic MM Fitting (Metric Male–Metric Male) is a precision hydraulic adaptor designed to connect two female metric-threaded hydraulic components securely. Both ends of the fitting have male metric threads, making it ideal for extending lines, converting configurations, or joining components within metric-based hydraulic systems.

Hydraulic MM fittings typically seal using an O-ring, bonded seal (Dowty washer), or cone seat, depending on the metric standard (DIN / ISO). This ensures leak-free performance, even under high pressure, vibration, and continuous operation.

Manufactured from high-strength carbon steel, stainless steel, or brass, Hydraulic MM fittings are built to handle demanding industrial environments. Surface finishes like zinc plating or nickel plating provide corrosion resistance and extend service life.

MM fittings are available in straight, step-reducer, and special adaptor designs, allowing compatibility between different metric sizes or pressure classes without altering existing hydraulic lines.

Key Benefits

Applications

Hydraulic MM fittings are an essential component in DIN / ISO metric hydraulic systems, offering flexibility, reliability, and clean fluid transfer.