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 6240-00-472-4635
NSN 5855-01-047-9267
NSN 6650-00-684-3060
NSN 6685-00-198-9506
NSN 6220-01-518-8139
NSN 5910-00-908-3061
NSN 6645-00-978-2575
NSN 5998-01-500-3999
NSN 5985-01-273-5351
NSN 5915-01-225-8931
NSN 5985-01-147-4519
NSN 5975-01-560-9902