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 6240-01-459-7827
NSN 6650-00-454-5215
NSN 5930-00-144-4994
NSN 6110-01-619-8037
NSN 6105-01-554-6250
NSN 5945-01-006-3280
NSN 5996-01-115-8509
NSN 6130-01-252-8823
NSN 6145-00-220-2687
NSN 6650-01-437-6279
NSN 5990-01-307-4489
NSN 6105-01-529-3579