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jbrett14 said:
Can someone tell me what the machined slot, through the tail end threads, is for? /ubbthreads/images/graemlins/confused.gif
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Yes. That slot performs a function when located at the front of the light [holds circuit board]. By cutting slots in both ends, they don't have to maintain end to end orientation in subsequent steps. This in a consideration when you automate production activities.