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 5905-01-014-5409
NSN 5950-01-642-3803
NSN 6220-01-611-7520
NSN 5965-00-092-5717
NSN 5935-01-287-8498
NSN 6645-00-255-1372
NSN 5960-00-246-4623
NSN 5910-01-243-5930
NSN 5985-01-337-1966
NSN 6610-01-006-3255
NSN 2925-01-528-7333
NSN 6130-01-436-2650