1" X 1/4" Pilots for Counterbore Shopify Collective Diameter: 1"

Diameter: 1"

Part Number: Assortment Kit #340777 Pieces - Coarse & Fine Thread

allowing for better-controlled hits to the workpiece

Shank Size 1-1/2"

1" X 1/4" Pilots for Counterbore Shopify Collective Diameter: 1"Product 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