5/8" X 1/8" HSS Aircraft Counterbore 1/4" Shank Quantity:1 Part Number DWC5-530-119

Part Number DWC5-530-119

Part Number DWDCO17/32

Part Number: Assortment Kit #488575 Pieces - Fine Thread

Part Number DWTH1316-832

Part Number DWRR10

5/8" X 1/8" HSS Aircraft Counterbore 1/4" Shank Quantity:1 Part Number DWC5-530-119Product 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