Gunsmithing mod. 70 guard screw ?

[264highlandhunter]

Does anyone know size and thread pitch right off?

 

[turbo54]

Re: mod. 70 guard screw ?

Action screws on '70s are 1/4-32, available thru Brownells, made by B-squared.

 

[blksno]

Re: mod. 70 guard screw ?

I'm actually looking for a 1/4-32 thread tap to clean up the threads in one of my actions. It seems the previous owner may have banged the living shit out of it cause one of them goes in really really hard and I don't want to force it and have something cross threaded.

 

[MarinePMI]

Re: mod. 70 guard screw ?

Ain't cheap, but here you go...

Brownell's HSS taps

Look towards the bottom of the list...

Gotta love Brownell's...

 

[blksno]

Re: mod. 70 guard screw ?

thanks...now would you suggest the bottom tap or plug tap since I know the difference, but am unsure about which to use.

<span style="font-weight: bold"><span style="text-decoration: underline">Material: Steel
Style: <span style="color: #3333FF">Plug</span></span></span>
748-001-432WB
Plug Tap, 1/4-32, 2, 17/64
Mfr. Part: S83006

OR

<span style="font-weight: bold"><span style="text-decoration: underline">Material: Steel
Style: <span style="color: #FF0000">Bottom</span></span></span>
748-002-432WB
Bottom Tap, 1/4-32, 2, 17/64
Mfr. Part: S83006H2

 

[turbo54]

Re: mod. 70 guard screw ?

You'll need a bottoming tap, because the holes are blind. In fact, I would, after getting as deep as I could with the bottoming tap, grind the tap to make a TRUE bottoming tap, to get that last 1 or 1.5 thread.