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 5990-01-565-2226
NSN 5960-00-681-0395
NSN 6650-00-518-5194
NSN 6220-01-555-8332
NSN 5935-00-045-9832
NSN 5925-01-069-2201
NSN 6645-01-099-6887
NSN 5925-00-722-8930
NSN 5999-00-007-7072
NSN 5990-01-045-7754
NSN 6650-01-499-7138
NSN 6685-01-134-3001