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 5999-01-631-2733
NSN 7035-01-034-6183
NSN 7035-00-541-8516
NSN 2925-01-115-0306
NSN 6110-00-965-5447
NSN 5990-01-058-4826
NSN 5985-01-255-2114
NSN 5999-00-364-7870
NSN 6220-00-376-8103
NSN 6110-00-883-3505
NSN 5905-01-658-3047
NSN 5855-00-089-3974