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 5910-00-266-8438
NSN 5935-01-018-8888
NSN 5910-01-504-9493
NSN 5975-01-237-2163
NSN 6135-01-010-0891
NSN 5965-00-465-9566
NSN 7035-01-287-9817
NSN 7035-01-530-6707
NSN 6135-00-100-8890
NSN 6150-00-101-9982
NSN 5945-00-182-7384
NSN 5930-00-709-3069