31/64" X 3/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Size 1-3/16"-18

Size 1-3/16"-18

Part Number D/ACT11/64

Part Number: EZ-SK31015

Drill Size: F

Vibra-Tite #: 111

31/64" X 3/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Size 1-3/16"-18Product 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