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 6610-01-027-0087
NSN 6240-00-740-8901
NSN 5990-00-900-4459
NSN 6610-01-129-3953
NSN 6620-01-301-3258
NSN 6145-01-178-6056
NSN 5855-01-384-7120
NSN 6150-01-458-4624
NSN 7035-01-245-7973
NSN 5990-01-217-4590
NSN 5960-01-512-0233
NSN 6145-01-623-3763