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 6130-01-444-3909
NSN 5990-00-135-6180
NSN 5945-00-902-1720
NSN 6610-00-835-7683
NSN 5915-01-207-0868
NSN 6645-01-265-8729
NSN 5960-00-369-8018
NSN 2925-00-422-5159
NSN 6135-01-049-5980
NSN 5920-00-880-6581
NSN 6320-01-033-6624
NSN 5945-01-384-4388