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 5990-01-487-0871
NSN 6620-00-269-5168
NSN 5998-01-053-2536
NSN 5975-00-271-0420
NSN 5930-01-206-0582
NSN 5910-01-222-0769
NSN 6645-01-296-4223
NSN 6240-01-486-8317
NSN 5835-01-132-5894
NSN 5935-00-057-7068
NSN 6130-01-470-8997
NSN 5835-00-816-0394