Drill America DEWCBRSOL12 #12 .215mm Machine Screw Solid Counterbore, DEWCBRSOL12 Shop by Category>Safety & Wearables Brush Research GBD150018 Gbd 15"

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Drill America DEWCBRSOL12 #12 .215mm Machine Screw Solid Counterbore, DEWCBRSOL12 Shop by Category>Safety & Wearables Brush Research GBD150018 Gbd 15"Drill America DEWCBRSOL12 #12 . 215mm Machine Screw Solid Counterbore, DEWCBRSOL12 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 are made