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 5998-01-386-7063
NSN 5925-01-634-0664
NSN 6610-01-352-5500
NSN 5950-00-079-8945
NSN 5895-00-732-9204
NSN 6685-00-198-9506
NSN 6645-01-478-2140
NSN 6110-00-348-9246
NSN 5975-01-408-6643
NSN 4140-01-484-8340
NSN 6610-01-318-1840
NSN 5965-01-479-8214