Hi Senthil,
Alpha numeric material/product IDs will be stored as it is (line ABCD_PRODCT_11) in MARA table where as numeric IDs will have preceding zeros in them (like 0000000020965). So, whatever the case is, a request should have the value as stored in the MARA table. For the above question my suggestion is to use the first screen capture as the reference.
Regards,
~Athreya