This small PDF of 164 KB lists the 6A05G to 6A10G range, a naming style typical of general-purpose 6 A axial rectifier diode families, so it is almost certainly a datasheet even though the index labels it a schematic. Expect a ratings table across the voltage grades, forward characteristics and package dimensions. It is handy when a rectifier in a power supply has failed short and you need a part with equal or higher voltage rating. Any PDF viewer opens it; verify the body marking first.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.