Rivits for stamped ribs

[lawheelock]

I am rebuilding a BC12D wing. I have already fabricated a new spar and am ready to start re-assembly.
The original rivits where the ribs assemble at the spars are a flat head but not countersunk. They are not rounded universal head rivits. I have seen on this site a reference to a rivit supplier, but without knowing what the part numbers of the original rivits are or were, I have not been able to find anything that looks like the originals. Is there an AN or MS number?
Any references would be appreciated.

Larry Wheelock, A&P, IA, BC12D, N96179

[NY86]

Re: Rivits for stamped ribs

MS20442 or AN442 rivets have flat heads. Look a lot like a properly set shop head.

[lawheelock]

Re: Rivits for stamped ribs

Thanks, John,
Ill see if I can find a source. I now have some numbers to help locate.

Larry

[3Dreaming]

Re: Rivits for stamped ribs

Were they still using the steel hollow tube rivets like they used on the built up ribs?