Drill America DEWCSCBR5/8 5/8" 21/32" Continuous Pilot Capscrew Counterbore, DEWCSCBR5/8 Shop by Category > Shop Equipment > Lubrication>Drains/Drain Pans Chadwick & Trefethen 60040 4mm

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Drill America DEWCSCBR5/8 5/8" 21/32" Continuous Pilot Capscrew Counterbore, DEWCSCBR5/8 Shop by Category > Shop Equipment > Lubrication>Drains/Drain Pans Chadwick & Trefethen 60040 4mmDrill America DEWCSCBR5 8 5 8" 21 32" Continuous Pilot Capscrew Counterbore, DEWCSCBR5 8 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 counterbores