Identifying a bolt (TY 10 S)
Identifying a bolt (TY 10 S)
(OP)
I am trying to identify the material of a failed bolt on from a project I'm working on. The construction drawings do not call out any bolts of this type. The bolt is 0.935" diameter, and has the marking TY 10 S on the head. I appreciate any help anyone can provide.






RE: Identifying a bolt (TY 10 S)
Sorry for the mix up.
RE: Identifying a bolt (TY 10 S)
RE: Identifying a bolt (TY 10 S)
It might be a Beanie baby or M12 x 40 machine bolt.
A search of the "TY 10.9 bolt" gives many hits.
RE: Identifying a bolt (TY 10 S)
RE: Identifying a bolt (TY 10 S)
You've probably asked these questions of someone already, but why would the erector be allowed to used a mixture of bolts in a connection? Was there any inspection? If the failure was brittle, it was likely a single event overload or low cycle overload, so the material properties are suspect.
Get chemistry and physical property tests done on the bolt, even if you can only get a hardness test and correlate to strength...better than nothing.
RE: Identifying a bolt (TY 10 S)
I didnt find any real supplier info on the TY, just the properties.
What was the nature of the failure, was it overloaded, or just one happened to pop?
RE: Identifying a bolt (TY 10 S)
The connection was overloaded, however no other bolts in the connection failed, all of which should have had a lower strengths.