SOCKET DRIVE IMPROVEMENT

摘要

Sockets, for example, hexagon sockets, dodecagonal sockets, and splined sockets, that have inner surface geometries adapted to engage a flank of a fastener at a point away from a corner of the fastener. In general, the sockets engage the flank of the fastener at a distance of about 30 to 60 percent of half a length of the flank away from the corner of the fastener. This increases the strength and life of the socket, reduces a risk of the fastener becoming locked or stuck in the socket, and reduces the risk of the fastener being stripped or the socket slipping on the fastener.

主权项

1. A tool to engage a fastener having a fastener head with a generally hexagonal shape, comprising:
a body have a first end; and an axial bore in the first end and including an inner surface having a contact point adapted to engage a flank of the fastener head at a distance of about 30 to 60 percent of half a length of the flank away from a corner of the fastener head.