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 5925-01-447-3279
NSN 5855-01-462-9279
NSN 5999-01-135-2991
NSN 5895-00-123-4842
NSN 5930-01-544-5936
NSN 6145-01-556-8015
NSN 6240-01-032-9952
NSN 5835-00-168-1657
NSN 5915-00-964-6381
NSN 5950-01-032-1583
NSN 6130-01-576-4015
NSN 6110-01-558-2023