#8 .163mm Machine Screw Solid Counterbore - High Performance & Durable Cutting Tool | Drill America

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#8 .163mm Machine Screw Solid 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

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**Product Specifications:** **Size:** R **Material:** High Speed Steel **Finish:** Black Oxide **Flute Length:** 4-1/2" **Overall Length:** 6-1/2" **Shank Type:** Round **Key Features:** - A dependable

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