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 5855-01-085-5354
NSN 4140-01-092-1098
NSN 5945-01-586-5518
NSN 6145-01-452-4437
NSN 4140-01-025-1555
NSN 5960-01-632-6576
NSN 6220-01-575-7741
NSN 6145-01-573-7994
NSN 5996-01-066-9003
NSN 6610-00-049-6497
NSN 4140-00-036-2851
NSN 5905-00-052-5820