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 7035-01-135-7783
NSN 6650-01-210-2080
NSN 5905-00-225-0416
NSN 6610-00-078-9620
NSN 5945-01-089-7220
NSN 7035-01-058-1935
NSN 2925-00-234-7918
NSN 5935-01-103-3495
NSN 5998-01-441-3197
NSN 5835-00-140-8646
NSN 6650-01-022-9523
NSN 4140-01-240-6125