1-1/2" X 3/8" Pilot Hole HSS Taper Shank Counterbore Shopify Collective with a high-visibility laser marking

with a high-visibility laser marking and a stamped marking

Part Number D/ACO3/8X31/64

Part Number T/A54790

Part Number: 37C1200ROD2Z

1-1/2" X 3/8" Pilot Hole HSS Taper Shank Counterbore Shopify Collective with a high-visibility laser markingProduct 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