9/16" X 7/16" Pilots for Counterbore BoltsandNuts.com Part Number DWDDL24X11/16

Part Number DWDDL24X11/16

Part Number DWRR3/4

Shape Cylindrical Miniature

Part Number DWDRSD1-3/16

Part Number: 100C600SHB307G

9/16" X 7/16" Pilots for Counterbore BoltsandNuts.com Part Number DWDDL24X11/16Product 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