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 6105-00-371-5954
NSN 6110-01-385-3193
NSN 6220-01-351-6686
NSN 7035-00-140-3070
NSN 6110-01-325-6751
NSN 5975-01-362-1476
NSN 6110-00-738-9767
NSN 7035-01-188-5935
NSN 5950-01-278-5794
NSN 5999-00-682-4354
NSN 2925-01-348-8306
NSN 5965-00-458-7321