one more update:
to answer my own question:
i entered my service tag in the dell.com/support website and clicked on VIEW CONFIGURATION link, and expanded the 400-BFJD section. it turns out to be a collection of 3 parts:
2FD61,"ASSY,BRKT,SSD,2230,3590",1
2HMFM,"INFO,C DRIVE,PCIESSD",1
8C3CP,"SSDR,512G,P34,30S3,TOSHIBA,BG4",1
i am posting this here so that anyone looking for such information will be benefited. thanks all.