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 5999-01-652-1417
NSN 6110-00-969-3323
NSN 6130-01-485-1367
NSN 5998-01-205-5284
NSN 5950-00-810-2854
NSN 6610-01-100-3662
NSN 5965-01-493-4060
NSN 5835-01-561-2959
NSN 5945-01-445-2845
NSN 6610-01-371-3006
NSN 4140-00-122-6422
NSN 6620-00-713-2701