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 5915-00-528-7992
NSN 7035-00-549-2722
NSN 5910-01-235-5951
NSN 6220-01-044-6940
NSN 5996-01-502-7877
NSN 5915-01-139-5014
NSN 6150-01-592-1313
NSN 6620-01-146-4680
NSN 6620-00-492-4936
NSN 5930-00-526-0662
NSN 6110-01-110-6776
NSN 5925-01-109-1268