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 6130-00-081-7217
NSN 5855-01-253-7695
NSN 6135-00-228-8140
NSN 5915-01-644-8554
NSN 5999-01-209-6899
NSN 5960-01-214-4518
NSN 5950-01-634-0677
NSN 6150-00-913-4917
NSN 6610-01-414-7481
NSN 6240-00-677-0305
NSN 5985-00-779-9130
NSN 6110-01-342-6869