9/16" X 1/4" Pilots for Counterbore BoltsandNuts.com Part Number DWTH112-71614LH

Part Number DWTH112-71614LH

Shape Ball End Miniature

Part Number DWDRSD3/8X11/16

Part Number DWDCO13/16

Part Number GLBCOX1223/64

9/16" X 1/4" Pilots for Counterbore BoltsandNuts.com Part Number DWTH112-71614LHProduct 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