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 7035-00-392-5417
NSN 6130-01-080-7805
NSN 5905-01-132-5000
NSN 5990-01-443-2931
NSN 5920-01-046-1062
NSN 6610-01-013-8922
NSN 6150-01-444-4470
NSN 5975-01-043-9423
NSN 5975-00-374-5245
NSN 5945-01-442-7796
NSN 5998-00-733-0015
NSN 5996-00-196-7258