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 6610-01-305-8863
NSN 6150-01-179-1557
NSN 5915-01-372-8918
NSN 6220-01-401-5337
NSN 5910-00-896-4793
NSN 6130-01-358-4064
NSN 5950-00-053-0469
NSN 6620-01-091-9697
NSN 6150-01-076-4811
NSN 7035-01-476-7787
NSN 6320-00-405-2348
NSN 5975-01-578-6071