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 6110-01-245-3059
NSN 5996-01-377-2439
NSN 6105-01-230-2010
NSN 6105-01-401-5361
NSN 6130-01-410-7551
NSN 6320-00-731-6134
NSN 6150-01-017-7688
NSN 5855-01-519-2933
NSN 6110-01-408-1309
NSN 6610-00-942-3383
NSN 5975-01-453-3359
NSN 5895-01-062-5359