2a and b8
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 5905-01-551-1724
NSN 5920-00-515-3617
NSN 5998-01-317-0921
NSN 5895-00-452-7134
NSN 6130-00-478-6971
NSN 6620-01-064-0366
NSN 5975-00-864-6613
NSN 6240-00-901-4200
NSN 5905-01-384-7884
NSN 4140-00-318-0159
NSN 6620-01-026-0346
NSN 5975-01-477-0185