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 6650-01-372-4990
NSN 5925-00-828-0708
NSN 5915-01-314-3136
NSN 4140-01-423-1647
NSN 5945-01-537-0202
NSN 5935-01-579-4071
NSN 5960-01-378-1729
NSN 6130-01-028-2231
NSN 6685-00-935-6961
NSN 5925-01-149-5474
NSN 6220-01-162-7954
NSN 5855-01-609-1869