38-036 casement lock

A home owner from New York says:
April 13, 2014
Hi, I purchased 4 of these to replace my old broken locks. They seem to be a very good fit but I don't know how to screw them in because they don't have the threads in the holes like the old ones. Please advise me on what I need to do. Thank You!
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Dave Sr. from SWISCO responded:
April 16, 2014
I see what you mean. In the past, I have used our 33-072 #8 x 3/8" self tapping screw.
Rear Mount Casement Lock, 2-1/2"
Rear Mount Casement Lock, 2-1/2"
38-036
$13.25
#8 x 3/8" SS Pan Head Philips Screw
#8 x 3/8" SS Pan Head Philips Screw
33-072
$0.30
Anatomy of a casement window
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