Oil filter bolt... what’s up with this?

my 1970 duster 340 had the 4 holes lined up-in 1979 I snapped it-no torque specs available. good luck finding a bolt in a junkyard. I doubt vans used the 90* mount and bolt. what is the actual inside diameter? does a hardware store bolt have the same hex diameter? I wish I bought some from mopar years ago-2468593 and P5007515. some machinist should make some - grade 5 would be fine. check billrolikenterprises.com