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 4140-01-005-1860
NSN 6240-01-048-8172
NSN 6320-01-606-2508
NSN 5945-01-067-9362
NSN 6135-01-548-1423
NSN 5925-00-608-0973
NSN 5910-01-231-9628
NSN 5920-01-349-9475
NSN 6105-00-999-2265
NSN 7035-00-205-1932
NSN 5965-01-169-1194
NSN 5895-01-282-9105