Hexagon Head Male Connector KQ2S The KQ2S hexagon head male connector fittings from SMC are quick and easy to install into your pneumatic fittings. These KQ2S hexagon male head connectors are also more compact in design which means that these connectors can be used within a confined space. Hexagon male head connectors are designed to allow tightening with a hexagon wrench in confined spaces. The new KQ2 range of products are lighter than previous models and have the advantage of improved insertion and removal forces. Can be used under a wide range of pressures from a low vacuum to 1MPa Low force required for fitting and removal Compact dimensions for use within smaller spaces Thread-to-Tube Adaptors