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 5950-01-116-2142
NSN 5965-01-028-2587
NSN 5930-01-579-9983
NSN 6130-01-586-3619
NSN 6105-01-288-3321
NSN 5930-01-018-4595
NSN 5960-00-170-9614
NSN 5999-01-040-3891
NSN 5835-01-259-0859
NSN 6145-01-225-2210
NSN 6610-01-461-8180
NSN 5895-01-579-3889