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Ships within 48 hours · Estimated delivery Aug 27 - Sep 1
Size SA-53
Shape: Cylindrical Radius-End Double Cut
Part Number: BIT-DMS73-2530
Part Number D/ACO3/8X39/64
7/8" X 1/4" Pilots for Counterbore BoltsandNuts.com Size SA-53Product 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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