Patent ID: 7195438

Claim:
A fastening system for securing a plurality of workpieces together in a fastened joint in a pluarlity of application having different load requirements, the fastening system comprising: a first pin and a second pin; each of the pins having an elongated shank and terminating at one end in an enlarged head and at its opposite end in a grooved portion comprising a plurality of circumferentially extending lock grooves and crests, the lock groove and crest geometry of the pins engaging a first collar or a second collar to fasten together the workpieces in the plurality of applications having different load requirements wherein the lock grooves of the first pin are of the longest width required for the first collar of lower strength in a shear application and the lock grooves of the second pin are of the longest width required for the second collar of greater strength in a tension application, and the crests of the pins are of the longest width required for the second collar of greater strength in the tension application, wherein the first collar and the second collar are of different strengths and different materials and the lock groove width for the second pin differs from the lock groove width for the first pin by no more that 10%, wherein the applications are selected from the group consisting of shear, shear/tension, tension, shear composite, shear tension composite and tension composite applications; and wherein either the first collar or second collar can be attached to the first pin or the second pin.