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 5915-01-611-5465
NSN 5855-01-478-2333
NSN 4140-00-093-6264
NSN 2925-00-411-6324
NSN 6320-01-422-1212
NSN 5990-01-498-0641
NSN 6110-01-332-7826
NSN 6130-01-509-4171
NSN 6620-00-269-5168
NSN 6150-01-467-2226
NSN 5998-01-312-5614
NSN 6620-01-490-5664