Easy furnace burner for propane forging

[Drew1966]

What size is a #57 drill bit please?

[12bolts]

What size is a #57 drill bit please?

Here you go Drew.
http://www.smithbearing.com/images/p...ionalChart.pdf
And I found that on google faster than it would have taken you to type your question

No charge, Phil

[Suttmike1]

What size is a #57 drill bit please?

I believe it is the same size as a #4 screw. I just drilled a hole and tapped it using the #57 bit. If I can find another screw, I’ll measure and post the size.