Fastener System with Spline Recess and Driving Tool

摘要

A plurality of mating splines (26) are located on an end of a tool for engaging the slots of the recess of a fastener. The splines are oriented to maximize torsional performance and to balance the shear strength of the pin with the shear strength of the tool. Additionally the ends of the recess splines and a minor diameter (28) of the tool include a matching curved surface (31) to increase torsional strength.