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 6620-01-591-6681
NSN 5990-00-419-0236
NSN 5925-01-202-8352
NSN 6645-01-100-3296
NSN 7035-01-618-6217
NSN 5910-01-122-1498
NSN 5835-01-435-4139
NSN 6650-01-063-7614
NSN 6240-00-123-7648
NSN 5930-00-768-7317
NSN 7035-00-193-2269
NSN 6685-01-436-5714