45/64" X 1/4" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Part Number DWRRHDES5/16

Part Number DWRRHDES5/16

Tap Size 1-1/2"-12

Part Number DWRRADJ8/A

Part Number DWDTS1-1/32

Height: 23-3/4"

45/64" X 1/4" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Part Number DWRRHDES5/16Product 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