30-Qty M6 x 25mm Long White Nylon Socket Head Cap Screw Plastic SHCS 11,000 PSI tensile strength (multiply by cross section of minor diameter to help determine strength of screw)
Perfect for your cnc mill router 3D printer. Linear rail and carriage bearings also use these screws.
These screws will fit most of the aluminum extrusion frame rail they is used for milling machines and routers.