Prime-Line M3-0.5 x 16 mm Black Oxide Coated Steel Class 12.9 Metric Internal Hex Socket Head Set Screws (10-Pack)

Socket head cap screws have cup points that produce a thin edge that digs into hard surfaces for a secure hold. Rounded head has splined outer circumference with internal hex drive. Use an Allen wrench (hex key) to secure with required torque as needed. Length is measured from underneath the head to the base of the cup point.