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Ships within 48 hours · Estimated delivery Sep 25 - Sep 30
Part Number T/A57041TN
Part Number: BIT-T/A54761
Part Number: 50C300HTBB/FT
Part Number: DUR297B-95
They are tested to ensure they meet IEC 60900:2018 and ASTM F1505-16 standards
5/16" X 3/32" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Part Number T/A57041TNProduct 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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