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 6320-01-407-8663
NSN 5960-00-703-3208
NSN 5998-00-928-9487
NSN 5910-01-619-2914
NSN 2925-00-010-2632
NSN 6240-01-522-6619
NSN 5930-01-262-0966
NSN 6220-01-090-7473
NSN 5930-01-074-1187
NSN 5960-01-496-7837
NSN 6620-01-039-5468
NSN 6240-01-432-0819