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 5960-01-442-1770
NSN 5990-01-065-0492
NSN 5960-00-304-8668
NSN 6110-00-410-8517
NSN 6135-01-095-1818
NSN 5895-01-182-3620
NSN 6105-00-173-7166
NSN 5999-01-512-1868
NSN 5990-00-924-4167
NSN 5930-00-009-0276
NSN 5960-01-426-4242
NSN 6130-00-300-1689