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 6145-00-345-2565
NSN 6110-01-408-5621
NSN 5996-00-408-1630
NSN 5905-01-571-8206
NSN 5895-01-353-8054
NSN 5835-01-245-8077
NSN 6645-01-233-1131
NSN 5910-01-578-8593
NSN 6650-01-467-2355
NSN 7035-00-104-7613
NSN 2925-00-076-7691
NSN 5965-00-859-8135