All the retaining screws of PC power supplies (NSP series and PCS series) employ metric screws.

Be careful not to use inch screws except for those shown in Table 1. Tightening an inch screw with an electromotive screwdriver will cause a fatal damage to the tapped nut of the power supply box.

Table 1 shows the type of screws used to fasten the RS232C interface cable to the NSP series Nonstop Power Supplies.


Table 1. Type of screws for RS232C cable