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 6650-00-097-8359
NSN 5925-00-079-5682
NSN 5990-00-106-6609
NSN 6320-00-261-9136
NSN 6240-01-092-3509
NSN 5945-01-355-7020
NSN 6220-01-549-3867
NSN 6685-01-542-8207
NSN 5945-01-144-8933
NSN 5999-00-938-3488
NSN 2925-00-764-0167
NSN 7035-00-981-7216