5/16" HSS Solid Counterbore Shopify Collective Part Number: 75C600SHB307G

Part Number: 75C600SHB307G

Part Number: M6C1000RODA4

Part Number DWRRS2-5/8

Part Number DWTH1-1213

Drill Bit Size: 47/64"

5/16" HSS Solid Counterbore Shopify Collective Part Number: 75C600SHB307GProduct 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