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 5960-01-377-1907
NSN 5855-01-031-4729
NSN 4140-01-359-7829
NSN 5960-01-254-0647
NSN 6110-01-595-9016
NSN 5930-01-017-7304
NSN 5895-01-031-3036
NSN 5975-01-499-1704
NSN 6240-01-171-5978
NSN 5915-00-243-2030
NSN 5930-00-451-7340
NSN 6685-01-276-1008