2-7/8" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Tap Drill Size 6

Tap Drill Size 6

Long reach jaws are designed for clamping large or hard-to-access workpieces

Part Number: 100C350HCS8Y

Flute Length 18"

Part Number DWC5-530-501

2-7/8" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Tap Drill Size 6Product 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