27/32" X 1/4" Pilot Hole HSS Taper Shank Counterbore BoltsandNuts.com Part Number: EZ-M1021

Part Number: EZ-M1021

Part Number DMS04-8027

Pilot Dia 11/64"

Left hand drill bits can also be used to drill out broken bolts

27/32" X 1/4" Pilot Hole HSS Taper Shank Counterbore BoltsandNuts.com Part Number: EZ-M1021Product 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