The SS-5 form is completed by an applicant to apply for Social Security.  This is a copy of the original SS-5 form I requested from the Social Security Administration for Fred Nufer.   The major data reflected here is:

Father - Christ (Christof) Nufer

Mother - Anne (Anna) Bolger (Boger)

Social Security Number

An example of his signature

Some of the data reflected here is either misleading or altogether inaccurate.  The birth date and birth place he entered here are wrong.  We know Fred was born in Russia before his immigration in 1892.  Anna Boger is actually Fred's step mother.