Generally the 8130's go into a file cabinet and get replaced with a parts tag with a bar code. Parts are classified into 2 major groups rotable and expendable. Expendables need a chain of custody as well down to a washer, they are usually tagged with a sticker and maintained in a bag up until the time thay are installed on the aircraft even in a batch as long as you can tie it back to the origional PO the feds seem happy.