17/64" X 3/32" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Part Number DWTST1-1/4-24P

Part Number DWTST1-1/4-24P

Part Number GLBCOX121/2

The certificate includes the initial accuracy

Part Number T/A54839TN

Part Number: 87C750HSBA325PL/PT

17/64" X 3/32" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Part Number DWTST1-1/4-24PProduct 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