Win./Miroku '86 threads metric?

kimwcook · Post by **kimwcook** » Sat Apr 26, 2008 10:49 am

I've seen this topic bounced around a little and the search didn't help. Does anyone know for sure and for certain if the threads are either english or metric, or partially english and metric. Like some of the screws are metric but the barrel is english?

I've seen some say they believe they're metric and then there's the reference to D&T for receiver sights and the ordered sight comes with screws and they fit. I haven't seen the definitive answer yet.

If in the future I needed a barrel or came across a barrel for a decent price, I'd like to know if it'd fit my Win/Miroku '86.

Post by **Hobie** » Sat Apr 26, 2008 10:59 am

When they D&T for the sights there is a reason they D&T English and that is because the sights, already available, mounting screws have English threads. No need to do so on the other parts. HOWEVER, some screws metric threads might be very close to English as they try to keep the screw and pin diameters the same (even through the conversion process).

Speaking of which I have such a thing I need to take care of on my Browning 95 and getting the 38 sight mounted...

salvo · Post by **salvo** » Sat Apr 26, 2008 10:59 am

Jim T's article about the Model 71 mentions the fact that Winchester and Browning barrels are different threads.
http://www.leverguns.com/articles/taylor/model71.htm

Pretty sure the Browning receivers are the same for the 1886 & 71

Windjammer · Post by **Windjammer** » Sat Apr 26, 2008 11:36 am

There is no way to tell without measuring the outside diameter and checking the pitch with a pitch gage.

Being in the machining industry, I do this often. This is the only way to be sure what the thread is.

Many threads are very similar.......English vs Metric

Grizz · Post by **Grizz** » Sat Apr 26, 2008 11:38 am

I took the saddle ring stud from my browning src to tacoma screw and the guy who checked it said it's 1/4-20. I have not followed up with a plug and just put the swivel stud back in the gaping hole...

I can't say that this is definitive, but it's indicative...

Grizz

Nate Kiowa Jones · Post by **Nate Kiowa Jones** » Sat Apr 26, 2008 6:32 pm

Windjammer wrote:There is no way to tell without measuring the outside diameter and checking the pitch with a pitch gage.

Being in the machining industry, I do this often. This is the only way to be sure what the thread is.

Many threads are very similar.......English vs Metric

+1
Dia. and pitch are the only thing that matters.

jd45 · Post by **jd45** » Sat Apr 26, 2008 8:08 pm

Well I'm not a 'smith like Steve, but woudn't they be metric since they're made in Japan? Just curious, jd45

Leverluver · Post by **Leverluver** » Sat Apr 26, 2008 8:41 pm

Guess that we'll just have to wait until someone chimes in that has pulled and measured one. FYI, don't count on the country of origin to determine metric or not. I was quite surprised when I pulled the barrel on my Uberti 76 and found that it had SAE threads. Very curious since everything else on them is metric.

Windjammer · Post by **Windjammer** » Sat Apr 26, 2008 9:36 pm

Would you believe Japan uses the British Standard pipe thread. Not metric...

Paul Jenkins · Post by **Paul Jenkins** » Sat Apr 26, 2008 9:57 pm

Gentlemen,
Nate Kiowa Jones was being VERY polite. If you don't have the ability to measure threads, you certainly don't have the ability to do ANY mechanical work on firearms. Ask a competent gunsmith to do the work before you injure yourself or someone else. This is not only for your safety, but of those you may shoot with.

Nate Kiowa Jones · Post by **Nate Kiowa Jones** » Sun Apr 27, 2008 1:44 pm

jd45 wrote:Well I'm not a 'smith like Steve, but woudn't they be metric since they're made in Japan? Just curious, jd45

Paul Jenkins wrote:Gentlemen,
Nate Kiowa Jones was being VERY polite. If you don't have the ability to measure threads, you certainly don't have the ability to do ANY mechanical work on firearms. Ask a competent gunsmith to do the work before you injure yourself or someone else. This is not only for your safety, but of those you may shoot with.

Well, what I'm really trying to say is you can't assume the gunmakers will use standard thread sizes, particularly, for barrel stubs. This is a pressure area and depending on the dia. of the case and the working pressure the stub and receiver will have threads that best suit the need. Then you throw in the fact that some metric threads and the inch versions can be so close itâ€™s useless to be concerned with if itâ€™s metric or standard. An example would be 0.75 metric and 34 standard or 1.0 and 25. They are almost interchangeable. If you are threading on a lath you will be limited to the gear combos too. Most gunsmiths canâ€™t tell you if the threads are metric or standard. Screws yes, but when it come to major parts they work in pitch and dia.

Bramble · Post by **Bramble** » Mon Apr 28, 2008 6:26 pm

Thread profile is different also.

Regards

Windjammer · Post by **Windjammer** » Mon Apr 28, 2008 7:05 pm

Bramble.......

What do mean by thread profile?

Post by **Chuck 100 yd** » Mon Apr 28, 2008 8:06 pm

Not Bramble , but, some threads are v 60deg. some are v 55deg. some are square (Acme) all this + gunsmiths often rethread recievers to straighten them out with the bolt way to improve accuracy. This makes the finished thread non standard so the barrel shank must be threaded to match.

RSY · Post by **RSY** » Mon Apr 28, 2008 9:53 pm

Windjammer wrote:Would you believe Japan uses the British Standard pipe thread. Not metric...

Sure, I believe it. Heck, don't they drive on the left side of the road, too.

Nate Kiowa Jones · Post by **Nate Kiowa Jones** » Tue Apr 29, 2008 1:03 am

Chuck 100 yd wrote:Not Bramble , but, some threads are v 60deg. some are v 55deg. some are square (Acme) all this + gunsmiths often rethread recievers to straighten them out with the bolt way to improve accuracy. This makes the finished thread non standard so the barrel shank must be threaded to match.

Chuck,
Square and acme are actually two different threads. Acme is a 29 degree cut with flat tops. Square is just that.

Windjammer · Post by **Windjammer** » Tue Apr 29, 2008 7:38 am

I know of many types of threads. Square is one I've never heard of.

kimwcook · Post by **kimwcook** » Tue Apr 29, 2008 9:18 am

Well I guess until someone tries putting an original bbl. on a Miroku or vice versa we still don't have the answer.

Nate Kiowa Jones · Post by **Nate Kiowa Jones** » Tue Apr 29, 2008 2:29 pm

Windjammer wrote:I know of many types of threads. Square is one I've never heard of.

This this link;

About Square and Acme threads.

Bramble · Post by **Bramble** » Sun May 11, 2008 5:16 pm

Marlins for instence use a square thread profile. Metrics are 60 degrees, Whitworth are 55 degrees.

Regards