Drill America DEWCBRTS2-3/4 2-3/4" X 1/2" Pilot Hole HSS Taper Shank Counterbore, DEWCBRTS2-3/4 Shop By Category > Air Tools > Accessories>Filters Coilhose Pneumatics NC0810-100K Metric Nylon

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Drill America DEWCBRTS2-3/4 2-3/4" X 1/2" Pilot Hole HSS Taper Shank Counterbore, DEWCBRTS2-3/4 Shop By Category > Air Tools > Accessories>Filters Coilhose Pneumatics NC0810-100K Metric NylonDrill America DEWCBRTS2 3 4 2 3 4" X 1 2" Pilot Hole HSS Taper Shank Counterbore, DEWCBRTS2 3 4 Counterboring is the enlargement of a portion of a hole that has previously been formed. If the counterbored portion is shallow (1 8" or less), the operations is usually known as spot facing; for example, a flat seat for a bolt head or nut. If, on the other hand, the hole is enlarged to a considerable depth, it is designated as counterboring. These