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 5990-01-320-9817
NSN 5935-01-398-1226
NSN 6110-01-068-3552
NSN 6110-01-540-1502
NSN 5960-01-628-2760
NSN 6150-01-255-6515
NSN 5999-01-478-3974
NSN 7035-01-555-8793
NSN 6685-01-016-2057
NSN 6320-00-004-9158
NSN 5950-00-195-5604
NSN 5920-01-027-4560