2-5/8" X 1/2" Pilot Hole HSS Taper Shank Counterbore Shopify Collective Part Number: BIT-T/A54760

Part Number: BIT-T/A54760

Part Number DEWCHAT2-90

3/8" x 6” and 1/2" x 6”

Part Number: Assortment Kit #3142011 Pieces - Coarse Thread

Size 1-3/4"-16

2-5/8" X 1/2" Pilot Hole HSS Taper Shank Counterbore Shopify Collective Part Number: BIT-T/A54760Product 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