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 6130-00-764-2278
NSN 5855-01-475-1987
NSN 6650-01-413-3825
NSN 4140-00-179-3008
NSN 5950-01-240-3265
NSN 5990-00-630-6154
NSN 5965-01-387-6938
NSN 6620-01-048-4145
NSN 5998-01-634-0604
NSN 6645-01-434-0248
NSN 5905-01-072-8572
NSN 5996-01-290-4844