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 5950-00-105-2002
NSN 5905-01-186-5092
NSN 6145-00-259-1622
NSN 5998-00-443-5081
NSN 5925-01-232-0246
NSN 7035-01-483-1776
NSN 6145-00-399-5201
NSN 5975-00-111-3208
NSN 5835-01-049-2965
NSN 5950-01-467-8141
NSN 5965-00-815-2525
NSN 6135-01-508-6083