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I have never seen a GI bolt with that marking, so I can not comment on it.
M14 Bolt Markings
2912
22
Bill
I'd like to ask you about a bolt on a pre-ban I bought some time ago, it reads "7790185" with just a "SA" underneath it. This leaves me to wonder where is the heat treatment code is. Any info will be much appreciated.
Thanks in advance
Bill[/b]
I'd like to ask you about a bolt on a pre-ban I bought some time ago, it reads "7790185" with just a "SA" underneath it. This leaves me to wonder where is the heat treatment code is. Any info will be much appreciated.
Thanks in advance
Bill[/b]
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I am aware that the drawing number is for an early bolt without the roller installed. What I was referrring to is the lack of a heat lot. I don't remember seeing a GI bolt missing a heat lot.
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I don't know. SA, Inc. had a bad batch of bolts about 20 years ago. It may pay to call them and inquire as to how they were marked.
As far as the part number 7790185 even the picture showing the bolt in SA's report on the T44E4 from 1955, has a heat lot number underneath the part number and SA mark.
It could have been left off, things like that do happen. I just don't know. If I could see a picture I may be able to tell by the font size.
As far as the part number 7790185 even the picture showing the bolt in SA's report on the T44E4 from 1955, has a heat lot number underneath the part number and SA mark.
It could have been left off, things like that do happen. I just don't know. If I could see a picture I may be able to tell by the font size.
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AW shucks, I cleared by cookies to do some dianostic work. That was me who failed to sign in. 
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Or possibly they meant it was a Devine Texas gun????
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Bill: I haven't any idea as to what she is referring to. Government Springfield, to me, means Springfield Armory in Mass. I am confident you know the difference, I have doubts about her.
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Quagmire is correct. The 85 bolts were produced under the drawing number ending in 85, which is a stripped bolt. 85 bolts were produced by SA, HRA, and WRA, but not TRW.
The 86 bolts were produced under the drawing number ending in 86, which treats the bolt as an assembly. With the bolt roller hassles, it was decided to stock, store, inventory and issue them as assemblies.
The 86 bolts were produced under the drawing number ending in 86, which treats the bolt as an assembly. With the bolt roller hassles, it was decided to stock, store, inventory and issue them as assemblies.
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