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 5999-00-015-8129
NSN 5905-01-149-9850
NSN 5950-00-116-8675
NSN 6240-01-188-7282
NSN 6105-01-462-8351
NSN 6110-01-148-1991
NSN 5965-00-246-9582
NSN 6685-00-653-1190
NSN 5965-00-164-8092
NSN 5960-00-993-8128
NSN 5965-00-549-0220
NSN 5945-01-388-2953