The standard rod that comes with the flush bolt for a 12" dimension (measured from the top/bottom of the door to the centerline of the faceplate) is only threaded on the ends.
Therefore, that rod cannot be cut in the field.
The Optional Rod Lengths (for non-fire rated openings - sold separately) are ΒΌ-20 All Thread, so they can be cut down in the filed if necessary.
Note that the standard, original rod must be used for fire rated applications.
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