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39/64" X 3/16" Pilot Hole HSS Straight Shank Counterbore - High Performance & Durable Cutting Tool | Drill AmericaCounterboring 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

Overall Length: 4-1/4"

Drill America - 2-1/8-8 UNS HSS Taper Tap

button-down collar

Head Length: 9/16"

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Choose the Drill America - 1-5/8-14 UNS HSS Taper Tap for unmatched reliability and performance

Enhance your safety and performance with the Drill America - 9/16-48 UNS HSS Tap Set

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Why Choose Drill America - 1-15/16-20 UNS HSS Tap Set

These blades are ideal for efficient and accurate cutting in a variety of materials

Overall Length: 6-5/8"

Tap Drill Size: 48