1" X 3/16" HSS Aircraft Counterbore 1/4" Shank BoltsandNuts.com Part Number DEW112180

Part Number DEW112180

Part Number: 100C275HCSSS

Diameter: #6-32

Size SA-12

Part Number: VibraTite90728oz

1" X 3/16" HSS Aircraft Counterbore 1/4" Shank BoltsandNuts.com Part Number DEW112180Product 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