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 6135-01-317-6021
NSN 6620-01-111-8210
NSN 5935-00-987-6022
NSN 6145-01-118-7859
NSN 5905-00-057-6725
NSN 5855-01-621-8620
NSN 5835-01-332-2867
NSN 5930-01-629-9486
NSN 5930-00-874-7637
NSN 5935-01-129-8130
NSN 6145-00-512-6675
NSN 5996-01-493-9908