3.1.1. Screw fitting
The modules shall be secured with M8 stainless steel or equivalent bolts with washers
and nuts. The applied torque is about 8 Newton-meters.
The module frame must be attached to a mounting rail using M8 corrosion-proof screws
together with spring washers and flat washers in four symmetrical locations on the PV
module.
Applied torque should be 5~8 Newton-meters. Please find detailed mounting information
in the below Figure.