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 6685-00-263-4545
NSN 4140-01-366-0336
NSN 2925-01-385-6661
NSN 5965-00-722-7574
NSN 5855-01-075-1292
NSN 6105-00-316-5098
NSN 5895-01-260-7512
NSN 6220-00-364-1605
NSN 5930-00-447-4251
NSN 6145-01-105-8937
NSN 6240-01-189-2367
NSN 6240-00-185-8367