1 inch DOM

[iroct]

Do you drill this before you tap it. If so what size. Thanks

 

[RPM]

Depends on the wall thickness and what tap you want to use.

 

[iroct]

It's the tube I got from you. need to cut and re tap

 

[RPM]

If you are going 5/8- 18 it does not need to be drilled.

 

[iroct]

3/4 16 is what I need Thick wall

 

[RPM]

Then you need to drill it to 11/16" first.

 

[iroct]

thanks very much kind sir Dwight