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 5996-00-691-1818
NSN 6645-01-157-3726
NSN 6645-01-166-3788
NSN 5990-01-581-5103
NSN 5925-00-184-5973
NSN 5930-01-544-8125
NSN 6130-01-140-1778
NSN 4140-01-526-1066
NSN 5945-00-263-3036
NSN 5915-01-206-5056
NSN 5920-00-474-6125
NSN 5915-00-406-0846