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 4140-01-175-0098
NSN 6650-01-063-7714
NSN 6645-01-453-8273
NSN 7035-00-870-0290
NSN 6610-01-162-4882
NSN 5960-00-917-5099
NSN 6610-00-469-7175
NSN 6240-01-649-1520
NSN 5905-00-787-2293
NSN 5996-01-108-3380
NSN 5920-00-522-6525
NSN 6105-01-570-9020