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 5975-00-228-6768
NSN 4140-00-969-3943
NSN 5985-00-879-4477
NSN 5930-01-194-5767
NSN 6110-01-149-9190
NSN 7035-01-549-5462
NSN 5855-01-108-9106
NSN 5965-01-568-0966
NSN 4140-01-325-8807
NSN 6135-01-265-1384
NSN 5925-01-605-1810
NSN 5895-01-399-6887