1-3/8" X 3/8" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com Part Number: 100C1000SHB307Z

Part Number: 100C1000SHB307Z

Part Number: M20X50DPOSAPL

Part Number: 75C1200BCGSS/316

Overall Length: 3-5/32"

Part Number KFD3F49/64

1-3/8" X 3/8" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com Part Number: 100C1000SHB307ZProduct 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