Valve cover bolts

[Peter L.]

 Putting the finishing touches on the engine for my KR. What would be the correct style bolts for the valve covers? Tried to look at original pictures, but its much easier to just ask the experts. lol.
  Thanks guys, Pete.

[Coralsnake]

Silver hex head, RBW with two washers. One flat one lock

[JD]

AMK seems to offer them...click on camera symbol for photo of kit contents
https://www.amkproducts.com/i-kits/ford-individual-fastener-kits/?year_=1968&model=Mustang&category=Engine%20-%20352%2F390%2F428

Might be this at NPD:
https://www.npdlink.com/product/valve-cover-mounting-kit/105383/202848?search_started_at=1775672224638&year=1968

[Bob Gaines]

AMK seems to offer them...click on camera symbol for photo of kit contents
https://www.amkproducts.com/i-kits/ford-individual-fastener-kits/?year_=1968&model=Mustang&category=Engine%20-%20352%2F390%2F428

Might be this at NPD:
https://www.npdlink.com/product/valve-cover-mounting-kit/105383/202848?search_started_at=1775672224638&year=1968

The right markings but incorrect size. The NPD kit link is for a small block valve cover according to applications listed.

[Peter L.]

Silver hex head, RBW with two washers. One flat one lock

RBW?  Thanks Pete.

[J_Speegle]

Silver hex head, RBW with two washers. One flat one lock

RBW?  Thanks Pete.

"RBW" would represent the head markings of the bolts. There are a number of different patterns used through the years so if your really focused then you'll want the exact pattern used for the application. Additional marking can represent the hardness rating for the bolt