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 5905-01-534-3754
NSN 5999-01-456-9333
NSN 6320-00-823-2015
NSN 5895-01-032-6691
NSN 6685-01-050-9827
NSN 5998-01-162-5698
NSN 5998-01-207-3565
NSN 5999-00-036-6162
NSN 6105-01-513-6730
NSN 5915-01-184-6270
NSN 6650-00-276-9838
NSN 5975-00-582-1460