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 5990-01-476-8813
NSN 6320-01-056-1164
NSN 5910-00-480-8267
NSN 6320-01-371-3047
NSN 5910-01-124-4280
NSN 5960-01-435-1167
NSN 5945-01-510-6901
NSN 5905-00-043-2363
NSN 5855-00-337-3679
NSN 5935-01-344-5588
NSN 5945-01-174-4724
NSN 5920-01-232-7106