47/64" X 1/4" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Length:1-1/2"

Length:1-1/2"

allowing for clearance into tight spaces

Part Number: 37C250EBSS

Part Number: 75C400HCSSS/316

Size 1-9/16"

47/64" X 1/4" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Length:1-1/2"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