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 5950-01-112-0085
NSN 6320-00-164-4087
NSN 7035-01-056-4603
NSN 6130-00-738-7290
NSN 5945-01-279-8826
NSN 6145-01-428-9932
NSN 6105-01-542-2960
NSN 5996-00-124-5105
NSN 5915-00-144-5548
NSN 5996-00-339-7078
NSN 5950-01-205-8137
NSN 5930-01-451-5020