Dafster Posted September 21, 2020 Report Share Posted September 21, 2020 Hello, I have a Mossberg MVP which i want to mount a suppressor to, the barrel is threaded from the factory and is stated as 5/8"-24, but when the suppressor i can choose between 5/8"-24 UNF and 5/8"-24 UNEF. Anyone who knows which one is correct? Quote Link to comment Share on other sites More sharing options...
baldie Posted September 21, 2020 Report Share Posted September 21, 2020 5/8" x 18 is UNF, and 5/8" x 24 is UNEF [ unified extra fine ] Quote Link to comment Share on other sites More sharing options...
Dafster Posted September 21, 2020 Author Report Share Posted September 21, 2020 Yeah, thats what i thought aswell, but as u can see here on the suppressor that was on it, it was marked as 5/8-24 unf, so I am a bit confused if that suppressor is wrongly marked and really is unf. Quote Link to comment Share on other sites More sharing options...
baldie Posted September 21, 2020 Report Share Posted September 21, 2020 Its incorrectly marked. 5/8"UNF is 18 threads per inch. 5/8"UNEF is 24 threads per inch. Quote Link to comment Share on other sites More sharing options...
Dafster Posted September 21, 2020 Author Report Share Posted September 21, 2020 thanks, i was starting to believe that aswell. got both me and the guy i spoke with on the phone earlier today really confused. Quote Link to comment Share on other sites More sharing options...
baldie Posted September 21, 2020 Report Share Posted September 21, 2020 Whilst its marked wrongly, the important bit [ 5/8" x 24 tpi ] is marked up, so it will fit your gun. Some of the Finnish mods simply state 5/8" unf, which technically should only be 18 TPI. The UNEF thread was one I cut very rarely over the last ten years, and all of a sudden, every bloody thing has it on. This was a tikka thing originally, as their major market is the states, and Bergara have followed suit. When a european manufacturer uses an American thread, its a big hint where most end up. Strangely enough in the states, they don't use many different threads at all. If its a 22 centre fire, they usually fit 1/2" x 28 which is the std AR15 thread, or 5/8 x 24 on anything bigger, such as an AR10 or any varmint barrel. They dont do metric. Quote Link to comment Share on other sites More sharing options...
Dafster Posted September 21, 2020 Author Report Share Posted September 21, 2020 yep, finding suppressors here(Norway) with american threads are a bit tricky Hausken which is arguably the most popular manufacturer here in Norway rarely manufacture them which may be why it's incorrectly marked. Anyway thanks a lot for the help Quote Link to comment Share on other sites More sharing options...
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