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 5930-00-284-4181
NSN 6105-01-244-7123
NSN 5910-00-276-3187
NSN 5999-00-147-5857
NSN 5835-01-656-2940
NSN 5990-01-400-3299
NSN 5945-00-473-0508
NSN 7035-01-525-7673
NSN 6145-01-267-1138
NSN 2925-01-274-8576
NSN 5975-00-103-6653
NSN 5950-01-449-6356