2-5/8" X 1/2" Pilot Hole HSS Taper Shank Counterbore Shopify Collective Shank Size: 27/64"

Shank Size: 27/64"

Pilot Diameter 3/8"

Part Number: EZ-EK41015

Part Number D/ACO33/64

Material: Steel

2-5/8" X 1/2" Pilot Hole HSS Taper Shank Counterbore Shopify Collective Shank Size: 27/64"Product 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