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Old July 5, 2012, 05:00 PM   #3
Jim Watson
Senior Member
 
Join Date: October 25, 2001
Location: Alabama
Posts: 18,539
That is the center to center hole dimension.
.278" is standard, a No 3 in the Wilson chart.

There is some fitting that can be done by varying link length but too much of a change in link size can cause more problems than it fixes.
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