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.)
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 6650-01-578-8176
NSN 6645-01-497-6543
NSN 6620-00-513-0738
NSN 6620-01-023-9330
NSN 6110-01-379-6257
NSN 2925-01-218-5556
NSN 4140-01-344-4847
NSN 6620-01-132-1776
NSN 6150-01-016-5289
NSN 5935-01-138-4855
NSN 6105-00-156-6460
NSN 6620-00-176-5722