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 6135-00-767-0331
NSN 4140-01-652-0633
NSN 5920-00-040-2923
NSN 5965-00-715-6159
NSN 5990-00-229-4647
NSN 6320-01-562-1599
NSN 6110-01-167-0872
NSN 6320-01-578-6006
NSN 5905-01-007-8702
NSN 5945-01-025-1163
NSN 5999-00-480-2564
NSN 6130-01-063-7446