Not installable without tapping threads or adding washers

I’m replacing existing knobs and the screws provided matched the length of the existing screws. However, the screws were just a bit too long. Some of the knobs worked once I tapped the 8-32 threads but not all knobs were drilled deep enough to tap them completely. They can be installed if you have a large supply of washers to compensate for the knobs not being drilled and tapped properly.

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