7/8" X 3/8" Pilots for Counterbore Quantity:1 Part Number DWRRS2-5/8

Part Number DWRRS2-5/8

Part Number DWDTLCT25/64

Overall Dimensions: 15" x 13/16" x 6-9/16"

Size 1-9/64"

Part Number DWCTXL345

7/8" X 3/8" Pilots for Counterbore Quantity:1 Part Number DWRRS2-5/8Product 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