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 5855-00-089-3974
NSN 5950-01-420-6528
NSN 6685-01-167-7364
NSN 5920-01-152-3481
NSN 5915-00-434-0485
NSN 7035-01-552-8475
NSN 6610-00-811-6072
NSN 5925-00-202-8715
NSN 5965-01-408-9551
NSN 6240-01-084-8098
NSN 5910-00-958-0017
NSN 6220-00-068-1000