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.)
NSN 6220-00-147-0035
NSN 5950-01-306-5209
NSN 6135-01-255-9129
NSN 5835-01-592-2350
NSN 5855-01-616-4391
NSN 5945-01-577-4413
NSN 5990-00-311-1031
NSN 4140-01-030-7807
NSN 5950-00-978-9290
NSN 7035-01-320-9820
NSN 5935-01-492-6212
NSN 5895-00-896-6049