1-7/16" X 3/8" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com All Tekton punches and chisels

All Tekton punches and chisels are made in the USA

Part Number: M12C16ASBA2

Pilot Diameter #22

Part Number: 100C275HCSSS

Part Number DEW6X5

1-7/16" X 3/8" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com All Tekton punches and chiselsProduct 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