1-3/16" X 7/16" Pilots for Counterbore Quantity:1 Part Number: Assortment Kit #568341

Part Number: Assortment Kit #568341 Pieces - Coarse Thread

Part Number: BIT-DWDCO3

Part Number: 62D500CABZ/TAPKING

Stainless Steel Flat Washers

contoured shape is designed to fit your hand and make it comfortable to spin the tool and apply torque from various positions

1-3/16" X 7/16" Pilots for Counterbore Quantity:1 Part Number: Assortment Kit #568341Product 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