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 6220-01-585-0726
NSN 6220-01-162-7954
NSN 6685-01-449-0062
NSN 5965-00-001-7593
NSN 5996-01-196-7363
NSN 5925-00-732-1929
NSN 6645-01-076-4655
NSN 5925-01-041-2876
NSN 6650-00-852-2736
NSN 5905-00-990-2026
NSN 6685-01-591-3741
NSN 6240-01-408-6394