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 5910-01-613-8842
NSN 2925-01-417-6815
NSN 6320-01-607-2978
NSN 6220-00-827-0227
NSN 6610-01-432-3229
NSN 2925-00-546-3129
NSN 7035-00-104-7613
NSN 5950-01-416-1963
NSN 5930-01-013-9251
NSN 5999-00-036-8454
NSN 5950-00-427-5262
NSN 5960-01-512-0233