2-7/8" X 1/2" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Pilot Dia 11/64"

Pilot Dia 11/64"

and woodworking

Size 1-1/4"-82

Part Number: 87C850HSBA325PL/PT

Class 10 Split Lock Washers Zinc

2-7/8" X 1/2" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Pilot Dia 11/64"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