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 7035-01-485-0269
NSN 4140-01-140-9727
NSN 6650-00-012-2430
NSN 6130-00-470-7825
NSN 5910-00-167-5036
NSN 6130-01-400-1385
NSN 6685-00-145-5269
NSN 5990-01-530-8452
NSN 6130-01-128-3058
NSN 4140-01-442-8862
NSN 5895-00-201-3742
NSN 7035-01-012-2259