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 5990-00-001-4570
NSN 5996-00-753-1599
NSN 6610-00-475-4400
NSN 5945-00-296-8464
NSN 5920-00-172-5551
NSN 4140-00-587-7476
NSN 4140-01-499-4244
NSN 5910-01-264-4358
NSN 6620-01-181-9853
NSN 4140-01-499-8335
NSN 5910-00-308-9733
NSN 6145-01-280-8067