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43/64" X 3/16" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com Size 1/4"-36

SKU 55614325348
4.5
Description

Size 1/4"-36

Products individually labeled and poly bagged

Drill Bit Size: #29

Flute Length 16"

43/64" X 3/16" Pilot Hole HSS Straight Shank Counterbore BoltsandNuts.com Size 1/4"-36Product 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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