Corners of hex flattened to 0.680 in. Wide
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.)
Classification: Nuts of iron or steel
NSN 5990-00-140-1159
NSN 6135-01-274-3546
NSN 5935-01-364-9235
NSN 6320-01-067-0474
NSN 5855-00-135-9064
NSN 7035-00-470-4977
NSN 7035-01-478-0212
NSN 4140-01-462-0268
NSN 5945-00-872-4662
NSN 6220-01-179-1236
NSN 5855-00-256-5562
NSN 5999-00-468-6359