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 6150-01-070-1926
NSN 6650-01-268-8147
NSN 5975-01-184-5203
NSN 5930-01-498-4032
NSN 5996-00-279-0484
NSN 6110-01-209-9136
NSN 5935-01-408-5191
NSN 5905-01-302-7132
NSN 6130-01-505-6558
NSN 5835-01-580-0446
NSN 5925-00-876-4074
NSN 6135-01-579-8864