A counterbore should be what measurement larger than the head of the socket to be used?

A counterbore is a cylindrical recess that allows the head of a socket or fastener to sit flush with or below the surface of the material being worked on. The correct measurement for a counterbore to be larger than the head of the socket ensures that there is sufficient space for the head to fit securely and the necessary clearance to prevent any interference when the socket is driven in.

In this context, the measurement of 1/64" is the appropriate size larger than the head of the socket. This small increment allows for a precise fit, which is essential in manufacturing processes where tolerances are tight, and even minimal variances can affect the functionality of the final assembly. Too large a counterbore could lead to instability, while too small could impede the fitting of the socket, which is why 1/64" strikes the right balance for sufficient clearance without compromising the integrity of the hold.