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 5895-01-071-4854
NSN 6650-01-458-4597
NSN 6145-00-548-7195
NSN 6220-00-707-5044
NSN 5998-00-959-2283
NSN 6130-01-379-2197
NSN 5930-00-087-5734
NSN 5950-01-104-8225
NSN 5996-00-186-8709
NSN 6130-01-627-4317
NSN 7035-00-549-2722
NSN 5960-00-435-1967