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 5990-01-575-3275
NSN 5910-01-356-6474
NSN 6150-01-408-0842
NSN 5960-01-036-3839
NSN 7035-01-364-8454
NSN 6240-00-624-1752
NSN 6105-01-267-9556
NSN 5835-01-104-5707
NSN 5910-01-633-4004
NSN 5855-01-020-7982
NSN 6105-00-435-7566
NSN 5895-01-266-6131