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 6320-00-468-8421
NSN 5985-00-365-6268
NSN 5905-00-451-6400
NSN 7035-01-116-6223
NSN 5920-01-234-2368
NSN 5996-00-649-8626
NSN 5996-01-432-1145
NSN 5935-01-279-9749
NSN 5935-01-468-4107
NSN 5950-01-609-9589
NSN 4140-01-517-3106
NSN 5835-01-659-1364