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 5895-01-243-0000
NSN 5985-00-110-7514
NSN 6645-00-629-9367
NSN 6105-01-624-5068
NSN 6145-01-423-8470
NSN 5915-00-609-0945
NSN 2925-00-066-9700
NSN 5999-01-269-5927
NSN 5930-01-192-7912
NSN 5925-01-537-3147
NSN 4140-00-763-2325
NSN 6240-00-126-4551