Product - The Socket Head Cap Screws ,Measurement System :Metric,Head Style: Socket Head Product Size - Thread Diameter: M3 ; Pitch Size: 0.5mm; Thread Length: 18 mm(Head not Included). Product Material - Stainless Steel(304) provides strength and offers good corrosion resistance in many environments Use - Socket Head Cap Screws Bolts can be widely used in the home and office appliance, communication equipments, ship assembly , the mechanical industry and small repairs around shops, garages or home furniture fasteners. Package Included - 50 x Socket Head Cap Screws Bolts (M3x18mm Socket Head Cap Bolts). Product Specification Socket caps have a small cylindrical head with tall vertical sides. Allen (hex socket) drive is a six-sided recess for use with an allen wrench (hex key).