1-3/4" X 7/16" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com Part Number: 75C450HCSL9Y

Part Number: 75C450HCSL9Y

Part Number: BIT-DWDRSD1-23/64

Part Number DWDTS2-11/16

Part Number DEWA0202

Part Number MMO3/16-4FSE-XLONG

1-3/4" X 7/16" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com Part Number: 75C450HCSL9YProduct 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