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 6135-01-089-4888
NSN 6150-01-100-1673
NSN 6320-01-616-0843
NSN 6645-01-562-3960
NSN 6105-01-063-6264
NSN 5960-01-337-5339
NSN 6110-01-532-4044
NSN 5905-01-212-2792
NSN 5990-01-016-3006
NSN 6240-01-633-2239
NSN 4140-01-502-4457
NSN 6135-01-447-5083