Socket head cap screws are ideal for tight tolerance applications needing a well-tooled appearance. Socket head cap screws are designed with a deep drive to witstand more torque when tightened, while requiring less surface area to counterbore than hex head cap screws. They enable easy access to driving when there is not sufficient space for a wrench or socket. Commonly used in machine parts, die fixturing and clamping used in machinery, engines, electronics and heavy equipment.Use with a hex drive or Allen wrench100 per packAlloy steelCoarse threads5/32 in. hex size