I lost my Nuts

I have a B20 W/ B16A head going together this weekend and I've lost head stud washer/nuts. Can't seem to get a concrete answer on their size/thread/pitch and what I need to order. ARP sells Nuts but I don't know which to buy for this.

Anyone help? Thanks!

 

What is the B20 in or out of, MM&Y?

 

It's a B20B - not sure what year it's out of.

It's using the ARP Stud kit for B20/B16A Setups though.

Just missing the nuts/washers

 

What did APR say when you called or emailed them?

 

I have a bunch of arp nuts and washers from a arp head stud kit if you're interested.

 

Well, I have 4 nuts and 8 washers if you're interested.

 

Thank you very much. I ended up calling ARP for the Part Numbers.

Just in case someone else ends up in the same situation. Here are the part numbers.

ARP 3008333 Stainless Steel 7/16-20 12-Point Nuts - Pack of 10

ARP 2008530 Premium Black Oxide Chrome Moly Special Purpose Washers - Pack of 10

 

I have order stuff directly from ARP shipping was kinda spendy but was worth it just call them and tell them what's going on.