1-9/16" X 7/16" Pilot Hole HSS Taper Shank Counterbore Quantity:1 STI Tap: M4-0
Description
STI Tap: M4-0
Part Number D/ACT31
Part Number DWD115J-TN-SET
Carbide Tipped Die Drills are designed for drilling hardened steels in the range of 45-65 Rc
Part Number: 31C250SHCSB
1-9/16" X 7/16" Pilot Hole HSS Taper Shank Counterbore Quantity:1 STI Tap: M4-0Product 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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