Don-Jo has a minimum order requirement. Orders smaller than the required minimum have a longer lead time as we need to consolidate onto a stock order. If you need a faster lead time, simply exceed the minimum order amount.
https://absupply.net/pdf/Don-Jo-2010_Catalog_Complete.pdf
The mortise depth is intended for a 5/32" thick latch face to sit flush against the edge of the door reinforcer.