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 5965-00-215-0307
NSN 5920-01-377-9518
NSN 6620-01-514-8859
NSN 2925-01-550-0177
NSN 6320-01-314-8017
NSN 5910-01-266-7562
NSN 5855-01-224-7975
NSN 6110-01-429-0008
NSN 5990-00-295-0968
NSN 5998-01-485-7004
NSN 5895-00-117-7793
NSN 6135-00-505-0679