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 6240-01-411-5425
NSN 5985-00-983-9433
NSN 5835-01-152-9483
NSN 5910-00-699-6391
NSN 6105-01-421-8897
NSN 5998-01-180-0549
NSN 5985-00-991-3546
NSN 6610-00-797-1417
NSN 7035-00-946-2642
NSN 6145-01-594-2389
NSN 6240-01-160-8499
NSN 5895-00-494-8589