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#2
06-03-2009, 11:56 PM
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Re: What type of screws are that?
Jochen
Those are <font color="red">Rauchen Verboten</font> bolts.  
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Sam...  
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#3
06-04-2009, 12:24 AM
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Re: What type of screws are that?
 Looks like "SS", but in Germany that may not indicate 'Super Sport'.  Those didn't happen to come from a WW II tank did they?  
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Don't mistake education for intelligence. I worked with educated people. I socialize with intelligent people.
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#4
06-04-2009, 12:25 AM
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Re: What type of screws are that?
   But i was thinking about "expansion screws"... 
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#5
06-04-2009, 12:00 PM
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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 schrauben-normen.de/amerikanisch
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#6
06-05-2009, 08:15 AM
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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.
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