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 5975-01-336-3022
NSN 5990-00-842-6949
NSN 5950-01-453-0663
NSN 5999-01-201-4744
NSN 6320-00-994-0179
NSN 5999-00-655-3867
NSN 5999-00-338-4431
NSN 6320-01-512-2031
NSN 6685-01-194-3931
NSN 6110-01-049-7986
NSN 6220-01-096-9082
NSN 6240-01-361-3499