37/64" X 3/16" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com Part Number DWDA/CX67/16

Part Number DWDA/CX67/16

Part Number DWDA/CX6U

Part Number GLBCOX1214

Part Number CTH1687

Part Number: 75C600HCSSS/316

37/64" X 3/16" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com Part Number DWDA/CX67/16Product Description 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 of two piece construction, having an integral shank and