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 6240-00-272-8601
NSN 6685-00-602-7209
NSN 5895-01-519-9373
NSN 5835-01-394-3812
NSN 2925-01-143-4229
NSN 5998-01-033-8285
NSN 5835-01-177-1092
NSN 4140-00-492-2468
NSN 7035-01-324-3839
NSN 7035-00-626-1958
NSN 6645-01-131-4328
NSN 5975-01-099-9450