Hillman M6-1.00 X 30 Mm Internal Hex Socket Cap-Head Cap Screws (6-Pack)

Socket cap screws are very common in industrial applications. A cap screw is a fastener for machine parts, threaded along the whole length of its shank and held by threads tapped in the hole in which it is screwed. These screws provide high-torque capability and the drive system is a hexagon-shaped hole.