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 5960-00-328-4058
NSN 6240-01-460-5100
NSN 6650-01-501-5661
NSN 6685-01-401-5360
NSN 5965-00-904-9103
NSN 5910-01-380-0086
NSN 2925-00-253-1655
NSN 5915-01-518-8114
NSN 6240-00-689-6379
NSN 5950-01-660-0241
NSN 5905-01-046-9148
NSN 6110-01-518-4248