9/16" X 1/4" Pilots for Counterbore Shopify Collective Part Number: BIT-T/A54924

Part Number: BIT-T/A54924

Size 1/2"-20

Part Number DWRR31/32

Part Number KFDRSD1-1/16

Part Number DWDBL37/64

9/16" X 1/4" Pilots for Counterbore Shopify Collective Part Number: BIT-T/A54924Product 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