Shaker bubble bolts

My shaker base is one of the oddballs with 1/4 20 welded nuts, on top of the base. What are the correct bolts for these? Anyone have original? Looking for head marking, washer size, length, coating.

Thanks
Cy

Cy,

I have a couple cars with the same 1/4-20 setup. There's a great thread where this was discussed in detail, and in it I posted some pics of these bolts. Search for the thread called "Shaker Adapter Ring Nuts", about 8 months back.

- Wade

Thanks Wade, I found it.

Cy