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 5998-01-326-7181
NSN 4140-01-493-9713
NSN 5996-01-603-2139
NSN 6135-01-472-9011
NSN 5895-01-401-5388
NSN 5925-01-498-5089
NSN 5915-01-398-9831
NSN 7035-01-487-4038
NSN 6130-00-350-5737
NSN 5975-00-147-4791
NSN 5998-00-944-0970
NSN 6110-01-019-4907