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 5990-01-378-7349
NSN 5996-00-115-6458
NSN 5960-01-256-1868
NSN 6105-01-048-9550
NSN 5985-00-740-7154
NSN 6130-00-400-5774
NSN 5990-01-054-4255
NSN 6240-01-306-1137
NSN 5930-01-490-1807
NSN 5945-00-583-8600
NSN 5925-01-652-9617
NSN 5985-01-063-6636