screwdriver question

[Riva9999]

Hello all, I have a bunch of the flat metal ones with the firing pin gauges etc in them. Most have the gauge hole marked 75 and 95 but a few show marks 17 and 19. A few marked 17/19 show a B or possibly an 8 above those, and I also have one that looks like it has 19 and 21 or maybe 24 (21 or 4 being the deeper) with a 7.62 above them. One the back that has a triangle with a split square in it and a circle around the triangle, which I also have on 17/19 ones though the circle is bigger in proportion to the triangle on those. Sorry no pics yet but I'm working on it. Any idea what the 17/19 or 19/24 are and are they safe to use to measure pin protrusion?

Thanks, Aaron (who has too many Mosins already)

[BuckeyeSgt]

Not sure if you've seen this
http://7.62x54r.net/MosinID/MosinAcc.htm#Bolt%20Tools

[Riva9999]

I have, thank you and I was able to place many of the examples I've got currently. The 19 and 24 one is a bit more problematic, and the "teeth" seem shorter than the surface of the rest of the key (looks like the one labelled double-stamped). I'm worried about using that as a gauge, what do the 17, 19 and 24 indicate? Maybe a different measurement system?

[Ratnik]

Some soviet scredrivers have markings with size of the notches in mm. 75 and 95 are inch measurements (0.075 and 0.095)
I saw 1,9\2,41, 2,2\2,4 (mm)

[steelbuttplate]

Lay them on top of eachother and compare. If one is too short hit it with a file, like making a key.

[steelbuttplate]

There are 25.4 millimeters in an inch. So .075x25.4=1.905. And .095x25.4=2.413. So it is of my opinion, the 1.9 and 2.4 marks on the screw drivers are millimeter markings and basically the same as 75 and 95 markings in size respectively.

That's way too close to being Algebra. Please, No more.

[ffuries]

There are 25.4 millimeters in an inch. So .075x25.4=1.905. And .095x25.4=2.413. So it is of my opinion, the 1.9 and 2.4 marks on the screw drivers are millimeter markings and basically the same as 75 and 95 markings in size respectively.

That's way too close to being Algebra. Please, No more.

Alge what? I thought math was Ugg has two rocks and Zog has one. Ugg takes Zog's rock, how many rocks does Ugg have now? And how many rocks does Zog have now?

[steelbuttplate]

No, math is if you load a full clip, and shoot twice, you have three shots left. Algebra was like trying to learn Turkish for me, flunked me out of college. Now I'm a Highway Engineer.

[SA1911a1]

I was never good with numbers either, but I was excellent with figures.

[SA1911a1]

To answer all screwdriver questions, I will say this; Vodka, orange juice and a little ice. Stirred, not shaken.

[Darryl]

To answer all screwdriver questions, I will say this; Vodka, orange juice and a little ice. Stirred, not shaken.

I tried that once ...... It works!!!

[ma96782]

Jeez....Harbor Freight sells a good digital caliper (frequently on sale at about $12). That caliper will also do metric with just a press of a button. Before you ask about how accurate it is.

Think of it this way......

"It's not like you'll be building an ICBM with it."

Aloha, Mark

[Junk Yard Dog]

Jeez....Harbor Freight sells a good digital caliper (frequently on sale at about $12). That caliper will also do metric with just a press of a button. Before you ask about how accurate it is.

Think of it this way......

"It's not like you'll be building an ICBM with it."

Aloha, Mark

...unless you are in North Korea.

[musketjon]

The math conversion is easy. Just remember this number: .03937. That's what each mm is in inch measurement.
Jon

[bunkysdad]

While some see pi as 3.14159xxxxxx all I see is cherry pie, apple pie, chocolate pie, peach pie, well you get the idea. We're we talking about screwdrivers and math?