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 5999-00-584-2006
NSN 6620-01-192-3927
NSN 6645-01-435-8356
NSN 6650-01-196-4667
NSN 5950-00-819-0231
NSN 6105-01-614-1310
NSN 6105-00-265-3185
NSN 5998-00-486-8326
NSN 5960-01-323-6432
NSN 5935-00-644-9978
NSN 5945-01-163-5198
NSN 5895-01-238-3906