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 4140-01-459-7411
NSN 6610-00-664-2190
NSN 6145-00-435-2308
NSN 5895-01-159-9683
NSN 6645-01-452-8469
NSN 6685-01-013-8915
NSN 5920-01-634-0250
NSN 6620-01-562-3862
NSN 5930-00-246-6314
NSN 5915-00-484-9487
NSN 5905-00-631-7267
NSN 6650-01-313-9752