1-1/8" X 3/8" Pilots for Counterbore BoltsandNuts.com Part Number: assortment-kit-159905 Pieces -

Part Number: assortment-kit-159905 Pieces - Coarse Thread

Part Number DWCF768

Overall Length: 5-1/4"

Part Number DWC5-530-378

1-1/8" X 3/8" Pilots for Counterbore BoltsandNuts.com Part Number: assortment-kit-159905 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