13/32" X 5/32" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Part Number: DUR396-95

Part Number: DUR396-95

Part Number: BIT-DEWSFC7/8-90

depending on the size

Part Number DWTSH2-7/8-8

Part Number DWDST17/32

13/32" X 5/32" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Part Number: DUR396-95Product 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