1" X 5/16" Pilots for Counterbore BoltsandNuts.com Part Number: 62CNNMB
Description
Part Number: 62CNNMB
Diameter:25"
Head Diameter: 20mm
Part Number: 87C350SHB307Z
1" X 5/16" Pilots for Counterbore BoltsandNuts.com Part Number: 62CNNMBProduct 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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