Thread of the receiver of Rem 700 Police

[dan12]

Hi guys, does anybody know what kind of thread is on receiver of Remington 700. I mean, 4 holes for the base. I need to clean this thread with screw-tap but here in europe nobody can tell me what is it.
Thanks

Dan

 

[lefty o]

most likely it is 6-48.

 

[Dennis Sorensen]

It is 6 x 48 unless someone has altered it. The vast majority of scope mount holes are 6 x 48.

 

[dan12]

Thanks guys ,is any International marking of this thread, I mean any ISO name or something ?

Dan

 

[skeetlee]

open them up a bit a make them whatever you need them to be. they will be stronger as well. Thats what i would do. Lee

 

[Dennis Sorensen]

Thanks guys ,is any International marking of this thread, I mean any ISO name or something ?

Dan

6 x 48 is unique to the firearms industry as well as 8 x 40. They are considered national special threads.

 

[Landers]

Bottom Tap

Brownells is one source in the USA for the taps. To clean the threads you probably need a bottom tap

http://www.brownells.com/.aspx/pid=17079/Product/HIGH_SPEED_STEEL_TAPS


6-48 Bottom Tap Part Number: 395-648-103

8-40 Bottom Tap Part Number: 395-840-103

I regret that I do not have knowledge of a Metric equivilent or a source in Europe.


Pete

 

[AeroE]

Thanks guys ,is any International marking of this thread, I mean any ISO name or something ?

Dan

ASME B1.13M-2005 and ISO 68-1 are the starting places without a cross reference already made up. I'll do some more research to see what I can turn up, but your problem is probably easily solved by converting to metric threads. A 48 threads per inch US thread is a 0.53 mm metric pitch, and a 40 pitch US thread is 0.64 mm's metric, so they both fall in between the standard metric thread pitches. I didn't bother to look at the round off rules for the metric threads.

 

[Crow99]

In Germany, try G. Reckangel. They are a manufacturer of all sorts of scope mounts, screws, and tools, and are of very high quality.

http://www.recknagel.de

On p. 155 of their downloadable catalog see:

"Gewindebohrer UNS 6-48 part nr. 00056-0648"

This is probably a taper tap, so if you need it to be a plug or bottom tap, just grind a few threads off the tip.

 

[dan12]

Thanks, guys for replies. Finally the situation is sorted out. My smith remade it for diameter of 4mm. It would take long time to get it in Slovakia so I had to sort it this way.Anyway, thanks.

Dan