Re: A.I.R. tube finish
The pipe tap is a 1/4-18 NPSF. You can purchase the tap at McMaster Carr.Use a 29/64 Tap drill. I drilled about .500 deep.I used a "P" drill for the tubes. I purchased the tubes from Paragon.The above information is for a LT1, but I believe that BB and SB take the same thread size.Jim
The pipe tap is a 1/4-18 NPSF. You can purchase the tap at McMaster Carr.Use a 29/64 Tap drill. I drilled about .500 deep.I used a "P" drill for the tubes. I purchased the tubes from Paragon.The above information is for a LT1, but I believe that BB and SB take the same thread size.Jim
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