What type of screws are that?
 

Anyone have seen it before? https://www.yenko.net/ubbthreads/imag...lins/dunno.gif

Was found in a 1982 Chevy C10...

http://up.picr.de/2365254.jpg

Re: What type of screws are that?
 

Jochen

Those are <font color="red">Rauchen Verboten</font> bolts. https://www.yenko.net/ubbthreads/imag...mlins/grin.gif

http://img.photobucket.com/albums/v6...enVerboten.jpg

Re: What type of screws are that?
 

https://www.yenko.net/ubbthreads/imag...mlins/hmmm.gif Looks like "SS", but in Germany that may not indicate 'Super Sport'. https://www.yenko.net/ubbthreads/imag...lins/blush.gif

Those didn't happen to come from a WW II tank did they? https://www.yenko.net/ubbthreads/imag...emlins/eek.gif


https://www.yenko.net/ubbthreads/imag...mlins/wink.gif

Re: What type of screws are that?
 

https://www.yenko.net/ubbthreads/imag...mlins/haha.gif https://www.yenko.net/ubbthreads/imag...mlins/haha.gif https://www.yenko.net/ubbthreads/imag...mlins/haha.gif https://www.yenko.net/ubbthreads/imag...iggthumpup.gif https://www.yenko.net/ubbthreads/imag...lins/beers.gif

But i was thinking about "expansion screws"... https://www.yenko.net/ubbthreads/imag...s/confused.gif

Re: What type of screws are that?
 

Ok... we´ve got it...

You can see 3 lines. That´s the strength limit.

And the SS is the Manufacturer https://www.yenko.net/ubbthreads/imag...mlins/grin.gif

schrauben-normen.de/amerikanisch

Re: What type of screws are that?
 

The 3 radial lines on the head indictate a SAE J-429 grade of 5.1. You're correct about the SS being the manufacturers head mark. The IFI or Industrial Fastener Institute logs those markings and sells the list to members. I have one somewhere but can find it.