operator arm

A contractor from Bristol ct says:
May 22, 2019

I believe I'm looking for the 39-188 handle for a window I have. Everything looks exactly the same except my arm is only 4 1/2 inches long. It looks like the arm on yours is 5 inches long. can you help with this? Is there another part number or will the 5 inch arm work for me? Thank you

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Dave Sr. from SWISCO responded:
May 23, 2019

Many thanks for writing in. I'm afraid we don't carry this sort of operator with the 4-1/2" link arm. You could either move over the sash bracket on the window sash or swap out the link arm on the 39-188 with the one from your operator. Then rivet it onto the new operator using the 62-014 rivet. Let us know what you think.
Sash Dyad Crank, 5"
Sash Dyad Crank, 5"
39-188
$37.10
Rivet
Rivet
62-014
$1.12
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