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 5999-01-502-9773
NSN 5998-01-326-1781
NSN 6240-00-398-0740
NSN 5895-00-157-1332
NSN 5960-01-512-0233
NSN 5855-00-411-8688
NSN 5895-00-409-6696
NSN 5920-00-866-3945
NSN 5985-01-502-6042
NSN 6130-01-599-6298
NSN 5835-00-180-7555
NSN 6150-00-121-1996