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 4140-01-174-0646
NSN 5905-00-432-0405
NSN 5965-01-199-8362
NSN 6320-00-925-0558
NSN 5965-01-475-7871
NSN 6320-01-519-8767
NSN 5920-01-379-5657
NSN 6240-00-527-8614
NSN 5996-00-401-8063
NSN 6645-00-442-0475
NSN 5960-01-045-3566
NSN 5905-00-782-8150