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 5855-01-217-4172
NSN 5835-00-279-1594
NSN 6220-00-333-6804
NSN 4140-00-920-0511
NSN 5998-00-201-7564
NSN 5930-01-270-0688
NSN 5895-00-938-7081
NSN 5960-01-449-1310
NSN 5910-01-476-8649
NSN 5855-01-495-6457
NSN 5915-01-479-4526
NSN 6130-00-954-2859