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 5920-00-841-2337
NSN 5990-00-230-8981
NSN 6320-01-436-9228
NSN 5985-01-600-0306
NSN 5910-01-505-2162
NSN 5915-01-505-6106
NSN 6610-01-103-4627
NSN 6610-01-033-1748
NSN 6610-01-444-4001
NSN 5920-01-178-8139
NSN 6320-00-701-0437
NSN 5945-01-186-6194