5/8" X 1/4" Pilots for Counterbore Quantity:1 Part Number: assortment-kit-4551511 Pieces -

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

Part Number DWTST3/8-27P

Part Number D/ARSD1-5/64

Head Length 1/2"

Part Number KFDRB15/16HEX-LONG-MAG

5/8" X 1/4" Pilots for Counterbore Quantity:1 Part Number: assortment-kit-4551511 Pieces -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