Screw-Slot Bits

Counterbore Hole Size for Socket Head counterbore slot Slot Cutter, Center Drill, Saw Blade, Side Milling Cutter, Chamfer, Tap Some users still use traditional solid cutting tool on the market for machining of counterbore slot callout Use this chart to find out what size counterbore hole to use for your ANSI Metric socket cap head screws and bolts

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