Everyone,

After reading your comments did some searching on Molex site and found
this "The pins come in either the standard (2.13mm) .084" or
(2.096mm) .0825" diameter."

Maybe the problem is the HDs with poor electrical contacts have the
smaller pins?

Here is the link for the Molex 8981 power connectors
@@ &o id=-8470&channel=Products&familyOID=-8470&frellink=Introduction&chanName=family&pageTit le=Disk%20Drive%20Power%20Connector%20|%20Overview

Thanks again everyone for your suggestions!

Ken