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13/64" X 3/32" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Size #12-40

SKU 77422565961
4.7
Description

Size #12-40

Insert bits are precision-engineered tips designed for use with power drills and screwdrivers to drive screws and fasteners

Alloy Grade 5 Split Lock Washers Zinc Plated

Size 7/8"-120

Part Number: BIT-T/A54789

13/64" X 3/32" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Size #12-40Product 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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