Prime-Line #4-40 x 3/8 in. Black Oxide Coated Steel Internal Hex Drive Socket Head Cap Screws (25-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.

• Designed for use in machinery, tools and dies
• Features cup points that dig into hard surfaces to secure hold
• Can be installed using an Allen wrench