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 5930-01-438-8140
NSN 5835-01-123-8305
NSN 6135-01-316-9794
NSN 6610-00-055-8600
NSN 5999-01-233-1552
NSN 5910-01-013-5040
NSN 6320-00-483-0451
NSN 6610-01-254-3647
NSN 6135-00-932-3136
NSN 6620-00-234-8918
NSN 5935-01-349-9918
NSN 5990-01-344-6176