What the 2mm Grid and Cover Tell You
The 87381-5064: The description '2MM MGRID REC TOP/E W/CVR.38AUL' confirms a 2mm pitch grid — that sets the board footprint spacing and the mating header pitch. The cover protects the contacts during handling and mating, which is useful in harness assembly where the receptacle sits open before the header is inserted.
RoHS Status Is a Compliance Gate
This part is marked RoHS non-compliant. If your BOM requires RoHS, this receptacle won't pass — factor in an alternative or a waiver before committing the line.