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 5915-01-078-6737
NSN 6135-01-338-2281
NSN 5975-01-500-0690
NSN 6105-01-596-6541
NSN 5990-01-571-3593
NSN 6610-01-168-6352
NSN 6130-01-425-1231
NSN 6105-00-788-1185
NSN 5920-01-274-3965
NSN 6650-00-466-1697
NSN 5998-01-205-8550
NSN 5975-01-141-7632