I picked up a 2003 350Z and i am trying to find out what size bolts the 12mm are ( length, what is the thread size is ) that go in the lower part of the timing chain cover because some one didn't put them back in when they replaced the the timing chains and guides. I'm trying to get them locally and nissan wants me to buy 10 of them to get 2 that i need the part numbers is 081A0-8701A