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 5998-01-381-1048
NSN 5910-01-237-2449
NSN 5835-01-251-7301
NSN 6220-00-020-0215
NSN 6650-01-366-7811
NSN 5920-01-469-7072
NSN 5960-01-334-5146
NSN 5855-00-532-0025
NSN 5905-00-856-2924
NSN 6650-01-615-7316
NSN 5965-00-182-7928
NSN 5855-00-014-5008