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 5990-01-110-4841
NSN 5920-01-206-3977
NSN 5965-00-347-0231
NSN 5895-00-794-7645
NSN 5915-01-500-2147
NSN 5960-01-344-2604
NSN 5999-00-666-3838
NSN 5960-01-127-2163
NSN 6320-01-033-6624
NSN 5960-01-235-2586
NSN 5935-01-107-5557
NSN 6135-01-235-4168