Lock cylunder

A home owner says:
The 82-310 key lock I recieved from you is 10 sixteenths in diameter and is too large. I need a 9/16th in diameter cylinder lock.
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Dave Sr. from SWISCO responded:

Hello -

It looks like you have an older Caradco handle set. For this handle, take a look at our  40-123 and the 40-129 keyed thumb turns. Give them a look-over and let us know if either of them could work for you. If not, you may have luck with a locksmith in your area.

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