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Part Number: BIT-DMS73-4010
Size 2-3/4"
Part Number: BIT-T/A54663
Part Number D/ASTCO39/64
61/64" X 1/4" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Part Number: BIT-DMS73-4010Product 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
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