5/16" X 3/32" HSS Aircraft Counterbore 1/4" Shank BoltsandNuts.com Shoulder Length: 1-3/4"

Shoulder Length: 1-3/4"

giving you a stiff and well-supported product suited for supporting the weight of the sockets • Universal Socket Organizer – Rail can hold 1/4 inch drive sockets and bit sockets

They're also marked with a high-visibility laser marking

• Multi-Purpose Ball Peen Hammers – Useful for setting rivets

5/16" X 3/32" HSS Aircraft Counterbore 1/4" Shank BoltsandNuts.com Shoulder 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