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 2925-00-157-1602
NSN 6220-01-317-3283
NSN 5915-00-059-5629
NSN 5895-01-370-0375
NSN 5960-01-322-1337
NSN 4140-01-204-7025
NSN 5855-01-586-0564
NSN 5925-01-128-2717
NSN 2925-01-548-6674
NSN 6240-01-173-2985
NSN 6150-01-023-1516
NSN 6145-01-377-0706