3/8" X 5/32" Pilot Hole HSS Taper Shank Counterbore BoltsandNuts.com Size: 1 Liter

Size: 1 Liter

Part Number DWTSMR2-21X2

Part Number: BIT-DWDRSD33/64

Length:1-1/4"

Part Number D/ARSD1-27/64

3/8" X 5/32" Pilot Hole HSS Taper Shank Counterbore BoltsandNuts.com Size: 1 LiterProduct 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