Sienna Cartridge Pen

[jtdesigns]

Does anyone know what the tap size/drill bit for the Sienna transmission? I am doing cartridge pens with the Sienna kits. I will be tapping threads into the 30-06 cartridge casing. Also, where would you find this tap size. Thanks in advance.

Jeff Tate

 

[BigShed]

I assume you mean the Sierra kit? If so I am told the thread size is 8.4x1mm, it'd better be as I just bought a tap that size for that very same purpose:biggrin:

This is the person I bought it from

http://www.penturners.org/forum/showthread.php?t=54428&highlight=taps

 

[jtdesigns]

Okay so what size of drill bit will you use since 7.4mm is hard to come by

 

[leestoresund]

You might try the library for the decimal conversion chart.
That lists all of the drill sizes.

Lee