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 6610-01-265-1824
NSN 6650-01-422-7106
NSN 4140-01-406-5344
NSN 7035-00-494-9158
NSN 5960-00-077-1828
NSN 5920-01-415-9331
NSN 6645-01-571-8578
NSN 5925-00-421-6629
NSN 6130-01-558-6762
NSN 6610-00-684-7683
NSN 6320-01-378-6191
NSN 5915-01-322-6245