21/32" X 3/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Part Number DWTSR1-1227
Description
Part Number DWTSR1-1227
Left hand jobber drills are for general purpose drill construction and feature a left hand helix for screw machine applications where spindles rotate counter-clockwise
Part Number: 62C300ASBABO
Drill Bit Size: 1
Part Number DWT54966
21/32" X 3/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Part Number DWTSR1-1227Product 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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