Ever since the new international terminal opened in SFO, I've had an easy time making connections there. BUT NOT ANYMORE! My last trip was in July and with 6 wide bodies arriving from Asia (mostly UA), we waited for at least one hour getting through immigration. Then there was customs and the domestic terminal security line! All in, it was a good 1 hr 45 minutes. I suppose if you had a tight connection, get the attention of a UA staff and he or she will take you to the front of the line. Considering your NH flight arrives at 10 AM, I would expect a lot of arriving passengers. Just to not stress yourself, I'd give a bit more time for connecting int'l to domestic in SFO.