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 5895-01-644-7590
NSN 6150-00-755-4852
NSN 6320-01-056-1164
NSN 5915-00-111-1905
NSN 6130-00-393-0645
NSN 5985-01-353-6279
NSN 6685-01-164-3344
NSN 5855-01-149-4110
NSN 5915-00-739-7331
NSN 6240-01-577-2859
NSN 5920-01-039-6118
NSN 5975-01-183-6413