1" X 1/4" Pilots for Counterbore Shopify Collective Shank Size 1-1/2"

Shank Size 1-1/2"

Part Number: M12X45DPA2

Part Number: 87C550HSBA325G/PT

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

Wrench Size: 1-5/16"

1" X 1/4" Pilots for Counterbore Shopify Collective Shank Size 1-1/2"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