1-3/16" X 5/16" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Part Number DEWCSK1/2-90

Part Number DEWCSK1/2-90

Part Number DEWX714-2HS

Part Number DWTHX11412LH

Part Number DWRRSP59/64

STI Tap: 3/4"-16 STI

1-3/16" X 5/16" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Part Number DEWCSK1/2-90Product 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