Notch on one side
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 5998-01-446-8446
NSN 5990-00-281-4164
NSN 6150-01-383-6826
NSN 6130-01-441-4175
NSN 6610-01-153-8625
NSN 5965-00-477-7587
NSN 5990-01-357-6175
NSN 5855-01-074-3336
NSN 5910-00-229-9567
NSN 6650-01-036-9083
NSN 6240-01-159-5043
NSN 6620-00-257-2783