2-7/8" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Size 1-3/16"-12

Size 1-3/16"-12

Tap Drill Size 6

Part Number DWC5-530-501

Finish Black Oxide

Part Number: 100C350HCS8Y

2-7/8" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Size 1-3/16"-12Product 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