1-1/8" X 3/8" Pilots for Counterbore BoltsandNuts.com Thread Length 1-3/4"

Thread Length 1-3/4"

Part Number DWRRS2-1/2

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

Part Number DMS70-2016

1-1/8" X 3/8" Pilots for Counterbore BoltsandNuts.com Thread Length 1-3/4"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