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 6685-01-128-3052
NSN 5935-01-262-6178
NSN 5930-00-935-4539
NSN 5950-01-607-0323
NSN 5925-00-081-9135
NSN 5930-01-646-4155
NSN 5910-00-924-9758
NSN 5855-00-491-7079
NSN 5945-01-191-2005
NSN 7035-01-529-4603
NSN 4140-00-643-3744
NSN 6220-01-627-0393