sftp transfer has different unix right

[M E Fieu]

Hi.. I have a unix user account for example david, which has umask 0002 in its environment.  so ,
if I touch a file in its home directory /home/david, the file will have rw-rw-r-- right.  But the
strange thing is if I use sftp to transfer file into the box using the same username and password,
the transferred file will appear to have rw-r--r-- right in /home/david folder.  Why ??   

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