5/8" X 1/4" Pilots for Counterbore Quantity:1 Part Number T/A57151TN

Part Number T/A57151TN

Part Number: assortment-kit-4551511 Pieces - Coarse Thread

Part Number DWCTXL341B

Overall Length 4-3/8"

5/8" X 1/4" Pilots for Counterbore Quantity:1 Part Number T/A57151TNProduct 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