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 6145-01-401-3713
NSN 5945-01-157-3655
NSN 5925-00-732-1929
NSN 6610-01-543-8567
NSN 6620-01-441-7896
NSN 5935-01-099-0573
NSN 5965-00-451-0518
NSN 5835-01-447-2544
NSN 5945-01-588-3144
NSN 5905-01-252-8833
NSN 5910-01-487-5354
NSN 6240-00-160-9223