What size ASA Thread TAP Size for SS or macroline

[Mechanic79]

Does anyone know what size hole and tap I need to make an rt pro foregrip a gas-thru grip?

I prefer to have a gas thru grip so I don't have to have the airline in the way of the trigger frame.

Thanks
Mechanic79

[Boydster]

1/8 somethin or another.

[space_weazel_45]

the holes for the gas fittings are 1/8in NPT[national pipe thread] the asa[where a bottle screws in] is showen here

http://airsoldier.com/~haveblue/tech/asa/index.html

[luke]

1/8" pipe is correct...

[Mechanic79]

What size tap?

1/8th inch is the size hole? what is the threading numbers? and coarse/fine?

Basically what Tap do I need to create a threaded hole for the macroline/SS hose elbow to screw into.

Thanks for the help everyone
Mechanic79

[Cristobal]

1/8th inch is the size hole? what is the threading numbers? and coarse/fine?

Basically what Tap do I need to create a threaded hole for the macroline/SS hose elbow to screw into.

Thanks for the help everyone
Mechanic79

1/8th NPT is the tap you want. But Pipe threads/taps aren't straight: they taper, so the actual hole is going to be quite a bit larger than 1/8 inch.

The tap drill is a size Q. Or, you can use a 21/64 drill and then ream with a tapered pipe reamer. If you do a google search for national pipe thread I'm sure you'll come up with all kinds of info.