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 6105-01-038-8309
NSN 5855-01-040-9233
NSN 4140-01-488-3969
NSN 6150-01-090-5153
NSN 5835-00-491-3834
NSN 5950-01-447-2839
NSN 5945-01-201-1416
NSN 6645-00-987-3409
NSN 5930-00-565-4176
NSN 5990-00-070-3006
NSN 5950-01-322-9494
NSN 5905-01-441-4623