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ship and engine builders
Part Number DWRR41
Interrupted Thread HSS NPT Pipe Tap
Part Number DWCWC304
Part Number: BIT-DULSF5
7/16" X 5/32" Pilot Hole HSS Taper Shank Counterbore Shopify Collective ship and engine buildersProduct 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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