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 5895-01-121-1049
NSN 6135-00-248-4102
NSN 5965-00-913-9545
NSN 6150-00-410-4959
NSN 5905-01-481-3943
NSN 5895-01-516-1929
NSN 5999-01-560-1311
NSN 5996-00-213-7121
NSN 6110-00-548-3970
NSN 6685-01-508-3469
NSN 5945-01-420-5891
NSN 6220-01-187-2664