The mounting face of the SPARK Flex features six #10-32 threaded mounting holes on a 2 in bolt circle. Each hole has an absolute maximum depth of 0.25 in.
DO NOT exceed the maximum mounting screw depth of 0.25 in when mounting the SPARK Flex. Doing so will result in permanent damage to the SPARK Flex and will void the warranty.
Depth gauges are laser-etched into each side of the SPARK Flex body to make it easy to check that the chosen screw length will not violate the maximum depth.
Simply check the screw length against the intended stack-up of structure and motor controller, and verify that it does not violate the maximum depth.