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 6105-00-812-8170
NSN 5960-00-791-1601
NSN 6320-00-731-6134
NSN 6620-00-179-1884
NSN 5996-00-761-8225
NSN 6240-00-143-6558
NSN 5855-01-060-8521
NSN 6320-00-994-0179
NSN 6610-01-276-7766
NSN 6150-01-398-5898
NSN 5905-01-245-0693
NSN 6150-01-410-9061