Nut, hex, heavy duty (requested name)
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 6650-01-093-6862
NSN 5930-00-081-8782
NSN 6110-01-076-4060
NSN 6240-00-197-6819
NSN 6130-01-643-7201
NSN 5990-01-247-8277
NSN 5930-01-400-6126
NSN 4140-01-350-3277
NSN
NSN 5905-01-016-8581
NSN 5998-01-392-0175
NSN 5920-00-054-7048