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 5920-00-815-0529
NSN 5915-01-230-7278
NSN 6645-01-406-0688
NSN 5935-01-414-9221
NSN 5910-00-799-3251
NSN 5990-01-121-1175
NSN 6220-00-674-4008
NSN 6135-01-415-1163
NSN 5920-01-579-4050
NSN 4140-01-426-8428
NSN 6135-01-300-8455
NSN 6320-01-578-6006