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 6620-01-346-9340
NSN 5999-00-577-0994
NSN 2925-00-902-3881
NSN 5999-00-960-0071
NSN 6145-00-845-5962
NSN 6130-01-399-0126
NSN 4140-01-188-0111
NSN 6220-01-476-2085
NSN 5930-00-012-5808
NSN 6105-00-106-1777
NSN 6130-00-435-4738
NSN 5985-01-449-4615