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 6610-00-823-9159
NSN 5910-01-296-9207
NSN 5910-01-397-9937
NSN 7035-01-467-7056
NSN 5965-01-595-9498
NSN 6135-00-243-8330
NSN 5965-00-529-0602
NSN 5945-01-310-4610
NSN 6130-00-877-5743
NSN 5920-01-596-1049
NSN 6135-01-265-1384
NSN 4140-01-421-1132