This Screw Set, W-Sems M4*8 3Cbc (50 pcs) is suitable for Roland XR-640 printers. This is the original Roland part (number 31239106AS).
 
Printer compatibility
Roland LEC-300a
Roland LEC-330
Roland LEJ-640
Roland SC-545ex
Roland SJ-645ex
Roland SJ-745ex
Roland XR-640
Roland FJ-540
Roland SJ-540
Roland SJ-640
Roland SJ-740
Roland LEC-300
Roland VG-640
Roland VG-540