15/64" X 3/32" Pilot Hole HSS Straight Shank Counterbore - High Performance & Durable Cutting Tool | Drill America Hole saws If the counterbored portion is

If the counterbored portion is shallow (1/8" or less)

Drill America - 1-3/8-14 UNS HSS Taper Tap

Drill America - 63/64 3MT Cobalt Steel Taper Shank Drill Bit

Morse taper extension sockets are adapters used to extend the reach of Morse taper tools in machining operations

15/64" X 3/32" Pilot Hole HSS Straight Shank Counterbore - High Performance & Durable Cutting Tool | Drill America Hole saws If the counterbored portion isCounterboring 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 counterbore cutter, and a