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 5855-01-628-2757
NSN 7035-01-552-7623
NSN 6150-01-463-7196
NSN 5905-00-261-7683
NSN 6320-01-435-5991
NSN 5920-00-806-5613
NSN 5965-01-296-8991
NSN 5950-01-521-4492
NSN 5910-01-573-5675
NSN 2925-00-355-5130
NSN 6130-01-134-0597
NSN 4140-01-426-4267