3/4" X 3/16" HSS Aircraft Counterbore 1/4" Shank Quantity:1 Part Number DEWCHAT7/8-90

Part Number DEWCHAT7/8-90

Part Number DULSB16

Part Number DIC13427

Part Number T/A54278TN

Size 1-3/8"-8

3/4" X 3/16" HSS Aircraft Counterbore 1/4" Shank Quantity:1 Part Number DEWCHAT7/8-90Product 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