HDGC KJ20X8.2B IRSD Flange back lock missing

[MediaLab]

Hello,

My zoom lens HDGC KJ20X8.2B IRSD Flange back lock screw is missing. What type of screw can I use to replace it?  

[jrhoffman75]

Give Canon a call.

Canon Parts Order Desk at (866) 481-2569.