NEW QUESTION/Does anyone know how to find .......

[morrcarr67]

Okay, thanks for the help in finding the specs.

I have another question. The OG specs call for the tool to be made of steel. I don't see any reason why it has to be. It's a GO/NO-GO gauge and really isn't doing much. Does anyone see why this couldn't be made out of a nice hard anodized aluminum?



So, I'm looking for a tool. It has an NSN number. I don't believe that it's patented but I can seem to find any in stock.

Does anyone know how to find the schematics for tools with NSN numbers?

Here's the tool in question:



Brownells has one, but they are out of stock on them.

https://www.brownells.com/gunsmith-tools-supplies/measuring-tools/firing-pin-protrusion-gauges/firing-pin-protrusion-gauge-prod26477.aspx

As you can see the Brownells one doesn't have any of the markings but looks just like it which is why I don't think there's a patent on them.

[Snoopy47]

Weak your Google is grasshopper.

Google on:

"army firing pin FIRING PIN PROTRUSION GAUGE national stock number"

result #1

nationalstocknumber.info › national-stock-numberFiring Pin Protrusion Gage NSN 5220-01-141-4732


Or do you want to make your own?

**************
So............... if I were to make my own, I guess it would merely need to fit within the bolt and check the depth of the firing pin when it's sticking out. I presume the measurements are GO and NO-GO. So long as the firing pin hits the 0.028 and doesn't hit the 0.036 then it's good to go, and as long as the tool isn't interfered with when in the bolt to get those checks it's going to do what it needs to do.

Ergo, probably why no one bothers with a patent.

[morrcarr67]

Weak your Google is grasshopper.

Or do you want to make your own?

No it isn't, I already told you that it had an NSN number.

Why do you think I'm looking for the schematics?

I need about 800 a year of these.

Sent from my BE2026 using Tapatalk

[OniKoroshi]

Looks easy enough to copy with bar stock since specs are listed on the tool. Or are you trying to make an exact copy?

SPECS: Steel. 2" (5.1cm) long, 1⁄4" (6.3mm) wide (from brownells)

[morrcarr67]

Looks easy enough to copy with bar stock since specs are listed on the tool. Or are you trying to make an exact copy?

SPECS: Steel. 2" (5.1cm) long, 1⁄4" (6.3mm) wide (from brownells)

Well crap, I didn't see that. I just looked and they're right there under the spec tab. Thank you.

Not trying to make an exact copy just a copy so that it will work for my customer. I'm just wondering if it's only a 1/4" wide, how thick do you think it is? An 1/8 of an inch?

EDIT

I just found the thickness, it's 0.062. Thank you OniKoroshi for all your help.

[SharedShots]

Well crap, I didn't see that. I just looked and they're right there under the spec tab. Thank you.

Not trying to make an exact copy just a copy so that it will work for my customer. I'm just wondering if it's only a 1/4" wide, how thick do you think it is? An 1/8 of an inch?

Yup .125

BTW, I found a boatload of .....right on my keyboard.






.

[morrcarr67]

Yup .125

BTW, I found a boatload of .....right on my keyboard.






.

[OniKoroshi]

Well crap, I didn't see that. I just looked and they're right there under the spec tab. Thank you.

Not trying to make an exact copy just a copy so that it will work for my customer. I'm just wondering if it's only a 1/4" wide, how thick do you think it is? An 1/8 of an inch?

EDIT

I just found the thickness, it's 0.062. Thank you OniKoroshi for all your help.

No prob.

[ar15barrels]

I'm just wondering if it's only a 1/4" wide, how thick do you think it is? An 1/8 of an inch?

EDIT

I just found the thickness, it's 0.062.

It's not 1/4" wide.
It's a good bit wider, just a little under the rim diameter of the 5.56 case.
I have one of the real-deal ones.

If you want to make 800 of them a year, laser cut them from sheetmetal.
Then harden and temper them to around 50c.
Then have a grinding shop grind all 3 measuring faces on both ends.

[morrcarr67]

It's not 1/4" wide.
It's a good bit wider, just a little under the rim diameter of the 5.56 case.
I have one of the real-deal ones.

If you want to make 800 of them a year, laser cut them from sheetmetal.
Then harden and temper them to around 50c.
Then have a grinding shop grind all 3 measuring faces on both ends.

Thanks. I was just looking at the pictures and it does look like the OG one is quite a bit bigger than the Brownells one. I just miked a case and bolt and it would appear that the case head it .36 and the bolt face is .37. I'm going to give the machine shops a .33 width.

[NeilMo]

NSN 5220-00-070-7815
Firing Pin Protrusion Gage
End Application:
Used on rifle, 5.56MM M16
Design Type:
Double end
Gage Type:
Combination go not go
Special Features:
Made of stainless steel; go is .036 in, no go is .028 in
Length:
2.000 inches
Thickness:
0.062 inches

[SharedShots]

Hint:

I use Google Lens when trying to find things. The results can be amazingly good. I'm not a fan of the Google know your life thing but their "Lens" feature does a very good job finding stuff. I had to go through a bunch of items recently that came to me through unfortunate circumstances and using Google Lens I found out not only their origins and so forth but their value etc.

Open you camera, take a picture, open the picture at the bottom of the photo app you see something called "Lens". At first I though it was an adjustment for the aperture or something like that, nope, tap on it, crop to the thing you want to find out about and Google searches all the images, everywhere.

Some of you might already know about it.





.

[SharedShots]

PSA

I found it using Google Lens.

Brownells sells them. Here you go:

https://www.brownells.com/gunsmith-tools-supplies/measuring-tools/firing-pin-protrusion-gauges/firing-pin-protrusion-gauge-prod26477.aspx

Google lens can find almost anything.

Specs of the one they sell:

SPECS: Steel. 2" (5.1cm) long, 1⁄4" (6.3mm) wide.

They are out of stock but are $29.99

Other sources that sell them:

DivisionMogul
GunspartsCrorp - in stock for $18.99

https://www.gunpartscorp.com/products/1481960

Make Google Lens your new friend. Try it, you'll be amazed at what it can find for you.

In Microsoft Edge and some other browsers, instead of taking a picture and using Lens you can right lick on the picture and search for the image. I tired it and all three sources of thee gauge also came up right away.

Image searches are often more accurate than text searches. Maybe this helps someone.













.

[morrcarr67]

Thanks for trying. That one at Brownells is the same one I linked in the OP. Others have also shared that I completely missed the specs listed on their sites. And another member posted info on the one dimension not given on Brownells website.

I already looked at Numrich and found several tools, but not the exact one I'm looking for. If you have a link to the exact one listed above I would be more than appreciative is you would share it.

As for Division Mogul, they are not located in this country. I'm not even going to look to see if they have it.

I found it using Google Lens.

Brownells sells them. Here you go:

https://www.brownells.com/gunsmith-tools-supplies/measuring-tools/firing-pin-protrusion-gauges/firing-pin-protrusion-gauge-prod26477.aspx

Google lens can find almost anything.

Specs of the one they sell:

SPECS: Steel. 2" (5.1cm) long, 1⁄4" (6.3mm) wide.

They are out of stock but are $29.99

Other sources that sell them:

DivisionMogul
GunspartsCrorp


Make Google Lens your new friend. Try it, you'll be amazed at what it can find for you.

In Microsoft Edge and some other browsers, instead of taking a picture and using Lens you can right lick on the picture and search for the image. I tired it and all three sources of thee gauge also came up right away.

Image searches are often more accurate than text searches. Maybe this helps someone.













.

[SharedShots]

Gunpartscorp has them for $18.99 but I'm not sure if it's the exact same one as they show only one flat side. It appears to have just a flat slot instead of the rounded slot.

https://www.gunpartscorp.com/products/1481960

HK can probably sell you them for $8,943.99 a piece though.