5/8" X 3/16" Pilots for Counterbore Quantity:1 Part Number DULSC3X6

Part Number DULSC3X6

Part Number DWDDL12X39/64

9 Alloy Zinc - 2PCS

Part Number: 75C87SSSAFLATBO/F912

Part Number DWTST3-8P

5/8" X 3/16" Pilots for Counterbore Quantity:1 Part Number DULSC3X6Product 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