u/trainerjyms13

My tech had to do a gain entry for someone locked inside a security office and brought me this off of a Sargent Mortise 4870 series style deadbolt. He says this ceased and needs to be replaced.

Admittedly, I have no idea what this is and it looks like it came off of a larger thumb turn, but he's newer and didn't remember seeing anything else that it was part of. I checked both sargent and Adams rite with nothing. Any help with a part number?

thanks