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 6110-01-149-4814
NSN 5925-01-467-9910
NSN 6610-00-168-2200
NSN 5999-01-011-5995
NSN 5998-01-144-7797
NSN 5960-00-245-2645
NSN 6620-00-679-5830
NSN 6150-00-932-3669
NSN 6620-01-194-2626
NSN 6150-01-607-9133
NSN 5905-01-262-8294
NSN 5835-00-532-5910