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 5960-01-573-6483
NSN 5920-01-444-3509
NSN 6240-00-985-3316
NSN 5999-00-419-3877
NSN 5950-00-447-0579
NSN 5945-01-008-3303
NSN 5950-00-337-0829
NSN 6685-01-454-3616
NSN 5996-01-012-4188
NSN 4140-01-211-0957
NSN 6220-01-453-4975
NSN 5905-01-513-9604