Apparently N00b Question - Barrel Thread Pitch

[idadd4]

I was wondering how to tell what the thread is for a flash hider?

The caliber is 6.8 SPC but unsure of the barrel actually on it. I assume since it is so close to a 7.62/308 it would be the 5/8-24 not the size for 5.56/223 at 1/2-28.

I also don't see markings on the barrel which might indicate the size, BUT I don't really know what I am looking for there.

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[P7M13]

Buy both thread sizes, and use the one that fits. Then you have a substantial reason to buy another gun -- "I had this abandoned flash hider that needed a home."

 

[idadd4]

I like the way you think but, so hasn't worked for ammo. Was having a hard time finding 6.8 but 7.62 ALL over the place. I was like, BUT look, I can get ammo and it is pretty reasonable. I just need the gun to go with it. Still not working ;(

 

[msgriff]

That wouldn't usually be marked on a barrel. 5/8x24 is the norm. If you wanted to verify, measure the major diameter (OD) of the threads.

 

[Hueco]

Measure it. If you don't have measuring tools, go to your hardware store and pick up a nut for both thread sizes. See which one fits.

Oh, and buy some measuring tools while you're there.

 

[OldBroad44]

Buy both thread sizes, and use the one that fits. Then you have a substantial reason to buy another gun -- "I had this abandoned flash hider that needed a home."

Wow! I have a number of holsters that have no guns to go with them....

 

[P7M13]

Wow! I have a number of holsters that have no guns to go with them....

And you have the profound wisdom to recognize the folly of my suggestion.

 

[titsonritz]

Does it matter?

https://blackrivertactical.ecwid.com/BRT-Thread-Adapter-1-2-28-to-5-8-24-p36634484

 

[DirectDrive]

Remove whatever muzzle device you have and measure the O.D. of the threads.
If you don't have a caliper then use a Polish Caliper (Crescent Wrench) and tape measure.

 

[OldBroad44]

And you have the profound wisdom to recognize the folly of my suggestion.

Folly? What folly?

 

[v0lcom13sn0w]

Buy both thread sizes, and use the one that fits. Then you have a substantial reason to buy another gun -- "I had this abandoned flash hider that needed a home."

thats like when i find a pile of brass on the ground in a caliber i dont have yet…welp, better build a gun that it fits…