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 5915-01-209-2788
NSN 5996-00-262-3211
NSN 6150-00-284-1369
NSN 6130-00-752-2579
NSN 5990-01-443-2931
NSN 5950-01-349-8983
NSN 5915-00-822-9605
NSN 5985-01-371-8654
NSN 6145-00-403-9458
NSN 5990-01-188-7309
NSN 6240-01-064-0949
NSN 6645-01-322-8897