Trans crossmember bolts

[slmdstnc]

I'm looking to bolt up my trans crossmember but it's been a while and I lost my bolts. Now I tried a few bolts and different pitches but feel I'm cross threading and don't want to continue till I get the right size. Anyone with specifics on these bolts would be a great help. Thanks in advance

P.s. Four bolts that mount the crossmember into the s14 chassis.