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 5920-01-335-9527
NSN 5915-00-614-1323
NSN 5925-01-067-7241
NSN 6150-00-479-0324
NSN 6145-01-590-1029
NSN 5945-00-904-8561
NSN 5945-00-393-0137
NSN 5985-01-250-1361
NSN 6135-01-604-8739
NSN 5999-01-018-0097
NSN 5935-00-993-3957
NSN 6220-01-381-1793