1-5/16" X 3/8" Pilot Hole HSS Taper Shank Counterbore Shopify Collective Length: 110MM

Length: 110MM

Drill Bit Size: 6

Part Number: 100C350HSBA325G/PT

Part Number DEWCSCBR1/2

Part Number: Assortment Kit #643109 Pieces

1-5/16" X 3/8" Pilot Hole HSS Taper Shank Counterbore Shopify Collective Length: 110MMProduct 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