Material is copper c2700
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 5910-00-615-9975
NSN 5990-01-565-2226
NSN 6650-00-226-7099
NSN 6135-00-553-7995
NSN 5990-01-510-1430
NSN 5965-01-420-6613
NSN 5996-01-180-5834
NSN 5920-01-220-1380
NSN 5945-00-055-1770
NSN 5965-01-505-8639
NSN 6110-01-127-9134
NSN 6220-01-449-1239