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 5920-00-298-0700
NSN 5910-01-600-2613
NSN 5935-01-235-0714
NSN 6135-00-248-4102
NSN 5945-00-099-9857
NSN 6610-00-518-4919
NSN 5960-00-926-7309
NSN 7035-00-104-7613
NSN 6220-00-578-6539
NSN 6645-01-307-8203
NSN 5935-00-189-3230
NSN 6130-01-579-3661