What kind of thread have the FX Impact berrels?

[Guest]

Hello
Knows someone the exact two threads from the FX Impact berrels? 

 

[gixxer3000]

Front is a standard 1/2" x 20 unf, no idea about the rear. See if you can screw the brass pieace onto the front, if yes then you knew what threads are in the back =)

 

[Guest]

"gixxer3000"Front is a standard 1/2" x 20 unf, no idea about the rear. See if you can screw the brass pieace onto the front, if yes then you knew what threads are in the back =)

The brass piece is already down but that does not help me further

 

[weatherby]

M9x1. But with help of a thread pitch gauge and a vernier caliper one can check it within 30 seconds.

 

[Guest]

Unfortunateli i have no thread pitch gauge
M9 x 1 for sure?
The outside diameter of the thread is 11,98mm
The berrel is cal. 25

 

[ericgs]

have a smartphone? there are some apps to use as a thread pitch gauge. not the same but may help

 

[weatherby]

Sorry Ken, misread the fact it is about an Impact barrel.
I was referring to the Royale series barrels.
When the outside diameter is about 12mm, I'd say M12x1. It is a very common size in EU.
If you have a caliper, you can set it to, let's say, 5mm, and look if it correlates with 5 winds of the thread.

KR,

Gijs

 

[Guest]

Yes it is a M12x1

Thank you guys!!

 

[steeve]

Curious why you need the rear thread size? Are you going to make a replacement part for the brass piece at the breech end?

 

[Guest]

"steeve"Curious why you need the rear thread size? Are you going to make a replacement part for the brass piece at the breech end?

I replace the ST against LW barrels and i make the brass piece out of stainless steel!

Why? -> KLICK <-