What screw size is for mounting holes of FOCBOX? Mike Schmeller December 28, 2018 20:15 Updated Follow You need M3 screws for the mounting holesDiagram attached for reference Related articles Focbox Physical Dimensions What is the Focbox? How do I configure my Focbox? How to install the Unity on a Raptor 2 Besides R-Spec kit, what items are required to make a complete board? Comments 0 comments Please sign in to leave a comment.