10-46 thread

[Bullseye Smith]

Ok everyone, I have been working on a extractor rod that has the broken threaded end. The threads are 46 per inch and eather a size 10 or 3/32 screw. Now I need help finding a tap and die for it, or a tap and a screw. Any Idea's???????????????????????????

[gunboat57]

Bullseye, check out this web page. It lists 10-46 taps.

JTS Machinery & Supply Co.

Browse around that site and you might find 10-46 dies too!

[Bullseye Smith]

Originally Posted by gunboat57

Bullseye, check out this web page. It lists 10-46 taps.

JTS Machinery & Supply Co.

Browse around that site and you might find 10-46 dies too!

Thank you Sir for the tap, I can't find the die myself, have problems sometime with eye and brain commutions.

[gunboat57]

I browsed the site a bit more myself and found 10-48 dies but not 10-46. Are you sure you need 10-46 and not 10-48?

[Bullseye Smith]

Originally Posted by gunboat57

I browsed the site a bit more myself and found 10-48 dies but not 10-46. Are you sure you need 10-46 and not 10-48?

Yes Sir, I checked it a dozen times hoping but it is 46.

[gunboat57]

Well, shoot! I can't find a 10-46 die anywhere on the internet. 10-48 yes, 10-46 no.

I even looked for a 3/16-46 since 3/16 is the closest fractional size to #10. Again, no luck.

Bullseye, what is the outside diameter of the male screw thread you are dealing with? Does it measure about .190 inches?

[airman]

Could millimeter sizes come closer?

[jrm53]

You could try MSC Industrial Supply Co. but they do not show a 46 tpi tap, I have made a rod for a Model 29 that a friend had that was twisted off but I had the part to check the threads on, I cant remember if it was lh or rh but it seems like it was lh threads. When I was working we used Manhatten supply for a lot of taps that were hard to find. Jeff

[paulj84003]

I just checked 4 ejector rods and they all measure .183 X 48
Paul

[Bullseye Smith]

Originally Posted by gunboat57

Well, shoot! I can't find a 10-46 die anywhere on the internet. 10-48 yes, 10-46 no.

I even looked for a 3/16-46 since 3/16 is the closest fractional size to #10. Again, no luck.

Bullseye, what is the outside diameter of the male screw thread you are dealing with? Does it measure about .190 inches?

.183 is what I get

[Bullseye Smith]

Originally Posted by paulj84003

I just checked 4 ejector rods and they all measure .183 X 48
Paul

But I am working on a triple lock, very old and not that many made. But the thread was also used on the the hand ejector also. I checked it a dozen times and it is 46 threads.

[tomcatt51]

Is it something really amusing like a whitworth thread form?

[smokymd]

I also mentioned in a previous post that it was 46 TPI but at a slow Sunday at a show I was reading- Jinks & Neal- revised - and on page 237 this info caught my eye.
May 22 1944 Change extractor thread from S&W .186-47 to N.S.-2 .186-47 (old standards worn out and cannot be duplicated) Lots of info in that book !!
John Claydon
SWCA #348

[gunboat57]

.186-47? My head hurts...

In any case, .183 diameter on the male thread makes it a #10, not a fractional inch size.