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 6620-01-406-3584
NSN 6620-00-232-2048
NSN 5915-00-180-3979
NSN 6645-00-189-7075
NSN 5855-00-427-7848
NSN 6610-01-308-6148
NSN 5960-00-642-9977
NSN 6145-01-206-3539
NSN 5960-01-448-3497
NSN 6110-01-453-0956
NSN 5895-01-042-4054
NSN 5895-00-342-9581