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Part Number: 0307-0004
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Get the Drill America - 3-1/2 X 5/8 X 1 HSS Arbor Type Keyeat Woodruff Cutter and experience the perfect combination of performance and protection for your professional needs
Drill America - 2-1/4-12 UNS HSS Bottoming Tap
3/4" X 3/16" Pilots for Counterbore - High Performance & Durable Cutting Tool | Drill America Set & Kits Part Number: 0307-0004Counterboring 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