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 5998-00-269-5444
NSN 2925-01-633-4048
NSN 5999-01-597-0412
NSN 5965-01-005-0341
NSN 5960-01-464-9605
NSN 6650-01-020-6148
NSN 6220-01-449-1239
NSN 5855-00-797-8217
NSN 6645-00-955-7997
NSN 6610-01-592-7568
NSN 6110-01-054-3032
NSN 5998-00-420-2384