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 5985-00-831-8763
NSN 6645-00-115-1213
NSN 5999-01-157-6626
NSN 5905-00-203-5913
NSN 5920-01-411-3493
NSN 6650-00-375-6632
NSN 5905-01-056-4659
NSN 5855-01-550-5219
NSN 5910-00-446-6571
NSN 5935-01-379-1016
NSN 5996-01-228-5334
NSN 6135-01-390-7364