Flexplate to crankshaft replacement bolts

[centy]

The bolts have a (d) marked on the head, nothing else.
I don't know what grade d is, if you do please tell me.

 

[AntzVN]

Does ARP sell these or does anyone have a link to buy some?
I have a eBay link...
https://www.ebay.com.au/itm/2508662...z92MvZQVO&var=&widget_ver=artemis&media=EMAIL
Are these ok?

 

[grey_hawk]

Not for a flexplate, as per the OP's original question...