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 6645-00-984-7687
NSN 6220-01-369-2925
NSN 6685-01-441-9378
NSN 6105-00-275-0826
NSN 5965-01-390-4382
NSN 5905-01-485-8245
NSN 5855-01-374-9116
NSN 6650-01-254-3690
NSN 5910-01-537-9052
NSN 6650-01-265-0650
NSN 5975-01-016-8263
NSN 6220-01-624-7803