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 6150-00-769-5017
NSN 6110-00-319-4768
NSN 6130-01-502-5580
NSN 6685-01-654-8070
NSN 6135-00-488-4478
NSN 5990-00-932-3070
NSN 4140-01-177-1445
NSN 5930-00-597-5064
NSN 5930-01-513-2169
NSN 5920-00-816-7535
NSN 7035-00-968-4848
NSN 5990-01-013-8464