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 6145-01-634-0388
NSN 6110-01-090-0804
NSN 6105-00-757-3613
NSN 5996-01-591-4782
NSN 5905-00-200-1402
NSN 5930-00-247-1530
NSN 5960-00-736-8568
NSN 5996-01-147-6054
NSN 6320-01-573-3215
NSN 6240-00-145-1536
NSN 2925-00-054-3550
NSN 5930-01-634-0659