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 6145-01-254-4080
NSN 5990-00-809-0088
NSN 5998-01-378-7311
NSN 6220-00-391-1076
NSN 6220-01-049-8835
NSN 6220-00-978-3172
NSN 5835-01-267-3388
NSN 5910-01-377-8579
NSN 6145-01-163-8368
NSN 6110-01-066-8038
NSN 5855-01-268-6468
NSN 6150-01-191-6431