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 6220-01-485-4233
NSN 5910-01-269-3253
NSN 6130-01-250-9162
NSN 4140-01-633-6618
NSN 5990-00-554-0366
NSN 5920-00-416-5999
NSN 5905-00-456-5358
NSN 5895-01-058-8677
NSN 5960-00-884-2535
NSN 2925-01-014-0118
NSN 6145-01-023-7719
NSN 5905-01-611-8880