Answer
Feb 20, 2026 - 08:22 AM
The counterbore hole size determines the space available for the screw head, ensuring it sits flush with or below the material surface. A precise counterbore hole size prevents material splitting and ensures a secure hold. Options like 3/8" in the Fuller C8 and 1/2" in the Fuller C1211 provide flexibility for different screw head sizes and project requirements.
