A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5915-00-187-7561
NSN 2925-00-056-7112
NSN 6220-01-204-8916
NSN 5920-01-124-9883
NSN 5960-00-949-5722
NSN 6240-00-973-8390
NSN 5998-01-433-2714
NSN 5935-00-753-7895
NSN 6320-00-894-1644
NSN 4140-01-507-0471
NSN 6150-01-417-2164
NSN 6650-00-011-3435