These side mount brackets can function as mounts for encaps for Actobotics channels. They have two untapped holes spaced 0.544" apart perpendicular to 6-32 tapped holes spaced 1.061" apart. These work well for perpendicular mounting of parts with the 1.5" hole pattern to parts with the 0.77" hole pattern.
Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be intuitively connected together. The wide range of components makes building complex electromechanical prototypes or finished projects a reality.