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 5895-01-651-9552
NSN 5915-01-149-6907
NSN 6610-00-682-6215
NSN 5910-01-444-0528
NSN 5925-01-407-5954
NSN 6130-01-238-5057
NSN 5965-01-354-9834
NSN 5990-01-134-7756
NSN 5925-00-968-7444
NSN 5960-00-991-1135
NSN 7035-01-445-3563
NSN 2925-00-887-7092