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 6620-01-602-8402
NSN 5999-01-074-8022
NSN 5960-00-551-2633
NSN 5915-01-431-8093
NSN 5935-01-508-9386
NSN 5985-01-461-3113
NSN 6135-01-223-3869
NSN 6135-01-413-4747
NSN 5960-01-467-0961
NSN 5998-01-206-8819
NSN 6645-00-947-0625
NSN 5930-00-322-9499