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 6650-01-152-0665
NSN 5950-01-379-5036
NSN 5930-01-503-7162
NSN 5998-01-493-3044
NSN 6610-01-030-8220
NSN 6620-01-411-9006
NSN 5910-00-176-7695
NSN 5985-01-240-2329
NSN 5999-00-639-3447
NSN 5950-01-401-5321
NSN 5925-01-124-7215
NSN 6320-00-445-1187