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 6320-01-624-0193
NSN 5975-01-379-8325
NSN 6130-00-456-3270
NSN 6150-00-063-1907
NSN 5996-01-433-2533
NSN 6135-00-243-8330
NSN 2925-01-334-7122
NSN 4140-01-249-3449
NSN 5960-01-411-5899
NSN 5935-01-176-7259
NSN 5920-01-027-0660
NSN 6650-00-597-7313