17/32" X 1/8" HSS Aircraft Counterbore 1/4" Shank Shopify Collective Part Number: M20C150HCS88Z

Part Number: M20C150HCS88Z

5xDia): 20mm

Part Number: BIT-DWTS3/8-24

Part Number DWRR13/16

17/32" X 1/8" HSS Aircraft Counterbore 1/4" Shank Shopify Collective Part Number: M20C150HCS88ZProduct 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