5/8" X 1/8" HSS Aircraft Counterbore 1/4" Shank BoltsandNuts.com Part Number DWRRB1-15/16

Part Number DWRRB1-15/16

to ensure the highest standards of dimensional accuracy and consistency • Corrosion-Resistant – We coat all of our keys with a durable manganese phosphate finish that's resistant to corrosion Clear Markings – With the exception of the smallest sizes

Tap Drill Size #66

and 12 inch hand drive extensions

5/8" X 1/8" HSS Aircraft Counterbore 1/4" Shank BoltsandNuts.com Part Number DWRRB1-15/16Product 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