1-1/8" X 5/16" Pilots for Counterbore Shopify Collective 4-inch shank Torx drivers: T6

4-inch shank Torx drivers: T6 - T45

Flute Length 2-5/8"

Part Number BRCT211

turret lathes

Part Number: BIT-DMS04-1146

1-1/8" X 5/16" Pilots for Counterbore Shopify Collective 4-inch shank Torx drivers: T6Product 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