M4 x 3mm Grub Screw DIN916 | Cup Point Hex Set Screw Grade 12.9 | Black Oxide High-Strength M4 Set Screw for 3D Printers CNC Robotics Hardware

Description ✅ M4 metric thread – 4mm diameter, 3mm length✅ DIN916 standard – cup point set screw✅ Grade 12.9 alloy steel – high tensile strength✅ Black oxide finish – corrosion and glare resistant✅ 2mm hex socket drive