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 6240-01-220-0492
NSN 5935-01-597-6900
NSN 5920-01-137-2410
NSN 5990-01-561-7802
NSN 6220-01-212-9016
NSN 5930-00-259-5146
NSN 4140-00-252-0879
NSN 4140-00-507-2602
NSN 6220-01-386-3810
NSN 6320-01-180-9908
NSN 5998-01-138-6882
NSN 5920-01-532-0031