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 5835-00-020-0443
NSN 5990-00-659-8067
NSN 6645-00-113-4441
NSN 6145-01-328-5998
NSN 4140-01-416-2798
NSN 5999-01-184-4060
NSN 6610-01-048-2870
NSN 5855-01-122-9418
NSN 6685-01-644-1782
NSN 5905-01-296-1127
NSN 4140-01-384-3890
NSN 6610-01-065-6057