What screw goes with 39-253L

A quick learner from Honolulu says:
I just received the Dual Arm operator 39-253L. Can you advise the type of screw I should use? The original were too corroded to determine what they were.
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Dave Sr. from SWISCO responded:
The manufacturer suggests a #8 flat head Philips screw like our 33-016, which is 1" long and stainless steel. You should really check the length first, though. You don't want to go to long and damage the frame.
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