3" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Part Number: DURSP18-CLEAR

Part Number: DURSP18-CLEAR

Part Number DWTSH1-3/4-20

Part Number: 060A-95-WFS

Just grab them and go—no adjustments

Size 3/16"

3" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Part Number: DURSP18-CLEARProduct 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