NRS vs UNRS threads

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Concerning NRS and UNRS O.D. threads, I've got to produce some tie rods that ask for Left and Right hand threads and I'm not finding any information in the usual places. Can anyone point me to web site? thanks.

 

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ive found the link below to have most of the dimensions ive needed for threaded fasteners

http://www.efunda.com/DesignStandards/screws/unified.cfm