Screw holes aren't threaded

A quick learner from Bainbridge Island, WA, USA says:
August 1, 2017
We ordered and received your 38-139. We are attempting to install it, but the screw holes are not threaded. Is this a manufacturing error, or is there some special piece we need.Kellee
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Dave Sr. from SWISCO responded:
August 4, 2017
Thanks for your order, Kellee. The lack of threads is not a manufacturer error. In the item description for the 38-139, we recommend using a 33-096 self-threading screw for installation. You could also possibly use a #8 self tapping sheet metal screw like our 33-072.
Roto Multi-Point Lock, 37MM Fork
Roto Multi-Point Lock, 37MM Fork
38-139
$24.44
#8 x 3/8" SS Pan Head Philips Screw
#8 x 3/8" SS Pan Head Philips Screw
33-072
$0.30
Phillips Pan 8-32 x 3/8" Self-Tapping SS Machine Screw
Phillips Pan 8-32 x 3/8" Self-Tapping SS Machine Screw
33-096
$0.37
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