US$ 14.85
Flute Length 89
Part Number KFDRSD13/16
Part Number DWC5-530-378
Part Number DWRRS2-1/2
Phillips tips are JIS compatible
1-1/8" X 3/8" Pilots for Counterbore BoltsandNuts.com Flute Length 89Product 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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