If you don't have a more detailed specification for this type of part, you aren't likely to get detailed information. The "SAE 1022" is only a composition (before case hardening) and does not help with mechanical properties.
What type of screw is this, e.g. thread rolling screw, self-drilling screw, etc.? What are the thread dimensions? Is the entire fastener case hardened, or is it only the tip like a Taptite with CORFLEX-I heat treatment?