[ARCHIVED THREAD] - OD for FH threads

Posted: 11/2/2004 11:14:28 AM EDT

Can someone tell me the OD for the threads on the barrel? I removed the MB off a barrel I have, I don't have a FH on hand to try, the reading I get with my caliper is 0.600 inches. Does this seem right for the 1/2x28 threads? Thanks

Posted: 11/2/2004 12:52:32 PM EDT

[#1]

No, 1/2 inch = .500, which is what (less a thou or 2 for clearance) the outside dia of the thread should be for a 1/2 - 28.

Posted: 11/2/2004 6:32:57 PM EDT

[#2]

I believe .6" will allow you to use a 1/2"-28 threaded flash suppressor, that is to say there is enough 'meat' to allow 1/2"-28 threading.

Posted: 11/2/2004 6:48:21 PM EDT

[#3]

Quoted:
Can someone tell me the OD for the threads on the barrel? I removed the MB off a barrel I have, I don't have a FH on hand to try, the reading I get with my caliper is 0.600 inches. Does this seem right for the 1/2x28 threads? Thanks

If you get the first 5/8" of the barrel turned down on a lathe to 0.500, you can thread it 1/2x28, but then you only have a 0.050" shoulder for the FH, which isn't really enough, IMHO. Does the barrel get bigger behind the the 0.600" section where the MB was located?

Posted: 11/3/2004 4:30:48 AM EDT

[#4]

The barrel goes to 0.732 behind the threads. I emailed Adco to see if they can recut the threads, if not to see if they can cut barrel , thread,and perm attach an A2 to keep it at 16"

Posted: 11/3/2004 4:37:37 AM EDT

[#5]

Quoted:
The barrel goes to 0.732 behind the threads. I emailed Adco to see if they can recut the threads, if not to see if they can cut barrel , thread,and perm attach an A2 to keep it at 16"

Ok, .732 gives a much better shoulder; Adco should have no problems turning/threading it.

Posted: 11/3/2004 11:20:54 AM EDT

[#6]

Text deleted after some reflection!!

[ARCHIVED THREAD] - OD for FH threads

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[ARCHIVED THREAD] - OD for FH threads

[ARCHIVED THREAD] - OD for FH threads