5/8" X 1/4" Pilots for Counterbore Quantity:1 Overall Length 4-3/8"

Overall Length 4-3/8"

Head Length 1/2"

Part Number DWTST3/8-27P

preventing them from being dropped • Four detent grooves provide a secure connection with the retaining ball of a drive tool • Made of high-performing 8660 Ni-Cr-Mo steel with a protective manganese phosphate finish

Part Number T/A57151TN

5/8" X 1/4" Pilots for Counterbore Quantity:1 Overall Length 4-3/8"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