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 6620-01-444-4048
NSN 6685-00-296-0392
NSN 6620-01-453-6764
NSN 5935-01-437-8664
NSN 5960-01-381-4692
NSN 5935-00-693-4426
NSN 6145-01-043-8139
NSN 6105-00-082-1198
NSN 2925-00-321-2032
NSN 2925-01-266-5229
NSN 6145-00-435-2308
NSN 5835-00-794-7500