Composition 4 material stress relieved per specification mil-b-857a ships
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: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 5985-01-120-9365
NSN 5920-01-334-7385
NSN 5935-01-370-4111
NSN 6320-00-779-5923
NSN 6135-01-242-6484
NSN 6135-01-485-4512
NSN 5965-01-625-1006
NSN 7035-01-388-6943
NSN 5975-00-596-4716
NSN 5835-00-632-8621
NSN 5998-01-193-7579
NSN 5910-01-395-5030