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 5925-01-166-7562
NSN 6150-01-134-5448
NSN 5915-01-557-9524
NSN 6650-01-200-3293
NSN 6610-00-161-7439
NSN 5920-01-634-0250
NSN 6320-01-255-2096
NSN 6130-01-472-8774
NSN 5975-01-290-2817
NSN 5835-00-572-7445
NSN 5950-01-197-2926
NSN 6150-01-471-7905