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 5915-01-424-6958
NSN 5990-01-630-5094
NSN 6110-01-612-6903
NSN 5835-00-185-4919
NSN 5999-00-056-7805
NSN 5990-01-160-6978
NSN 6620-01-119-0664
NSN 6240-00-902-0936
NSN 5999-00-718-0229
NSN 2925-00-928-5931
NSN 6135-01-611-0125
NSN 4140-01-231-9419