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 5855-01-435-5548
NSN 7035-01-003-1944
NSN 5999-01-478-3529
NSN 5985-01-130-5942
NSN 4140-00-213-9937
NSN 5910-01-556-8008
NSN 5990-01-510-4699
NSN 5855-00-896-4047
NSN 5960-00-976-4871
NSN 5999-01-512-3060
NSN 5950-01-337-9184
NSN 6650-01-496-2662