A flat disc with either internal or external threads for attachment to other STEM SYSTEM components. Switches can be attached to the flange (2 or 3 inch diameter available)

2 inch flange has pre-drilled holes to match screw pattern of Buddy Button^TM (or Big Buddy) 3 inch flange has pre-drilled holes to match screw pattern of Jellybean Button^TM

An end flange giving 1/4"x20 camera mount thread is available for the use of switches that use this thread style (Zygo Industries Inc. and Prentke Romich Company).

Switches can be connected to end flanges using adhesives or Velcro if the pre-drilled holes are not suitable.