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Page AK-47 » AK Discussions
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Posted: 1/6/2012 4:50:17 PM EDT
How do you figure what thread pitch is best to use if your barrel is not already threaded?  I see a lot of brakes and a lot of thread pitch's to use so I am slightly confused.
Link Posted: 1/6/2012 5:47:38 PM EDT
1/2x28 is standard for 22 and 5.56

5/8x24 is for .30 cal's

there are a bunch of oddities and other variations but those two are the most common

if you have a different caliber, list it and we can let you know
Link Posted: 1/6/2012 6:14:22 PM EDT
Well since you're posting this in the AK section the 7.62 AKs typically use 1x14mm LH threads for barrels .550" and thicker. Under that you can do 1/2x28 RH just make sure the device is bored for a 30 cal. Some devices like the AK 74 style have even larger 28mm (diameter) threads attached right to the FSB.

What rifle do you have?
Link Posted: 1/6/2012 6:58:09 PM EDT
My rifle is a Hungarian Sa85M.  I have seen on YouTube in some threading videos that people cut a shroud off he barrel on I think Saigs.  Does my file need this done?  Please also verify the thread dims too. Thx.
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AK Sponsor: palmetto
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