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 5945-01-053-6753
NSN 5985-00-489-2167
NSN 5920-00-921-0390
NSN 6620-01-259-5944
NSN 5998-00-197-5849
NSN 5998-01-602-5652
NSN 5975-00-382-2722
NSN 6150-00-152-3947
NSN 5835-01-544-5183
NSN 6135-00-488-4478
NSN 5990-00-772-3596
NSN 4140-01-513-4243