Abstract: The invention is a tapered tail rivet for joining two or more structural elements together which, during driving, provides a controlled expansion of the hole and, after driving, leaves residul hoop compression stresses around the hole. The tapered tail rivet has a shank having a nominal diameter (the diameter in the middle of the tolerance range). The head diameter may be of the type critically dimensioned based on the shank diameter or other design parameter. The tapered tail length is between 1.30 times the minimum shank diameter and 1.10 times the maximum shank diameter. The distal end of the tapered tail has a diameter of between 0.80 times the minimum shank diameter and 0.68 times the maximum shank diameter. The tapered tail portion should extend to the face of one of the structural elements to just inside the face of that structural element prior to driving. The minimum upset tail diameter should be 1.45 times the nominal shank diameter and the minimum upset tail height should be 0.

Abstract: The invention is a flush-head rivet design 10 for joining two or more structural members together. One of the plates 52 incorporates a countersink 55 in the hole therethrough having an included angle 56 of between 99 to 101 degrees. In detail, the rivet 10 comprises a shank portion 12 having a minimum and maximum allowable shank diameter 18. The flush head 14 of the rivet includes a head diameter 23 before forming a land 24 on the edge thereof of between 1.642 times the minimum shank diameter 18 and 1.646 times the maximum shank diameter. The crown 26 has a height 25 between 0.074 time the minimum shank diameter 18 and 0.089 times the maximum shank diameter and a crown radius 27 between 4.334 times the minimum shank diameter 18 and 3.747 times the maximum shank diameter. The underhead surface 32 taper angle 34 is between 104 and 105 degrees. The land width 24 is between 0.007 times the minimum shank diameter 18 and 0.015 times the maximum shank diameter.

Abstract: The rivet 10 comprises a shank portion 12 having a minimum and maximum shank diameter 18. The flush head 14 of the rivet includes a head diameter 23 before forming a land 24 on the edge thereof of between 1.875 times the minimum shank diameter 18 and 1.879 times the maximum shank diameter. The major crown 25 has a height 26 between 0.063 times the minimum shank diameter 18 and 0.078 times the maximum shank diameter and a major crown radius 27 between 2.974 times the minimum shank diameter 18 and 2.690 times the maximum shank diameter. The minor crown radius 30 is between 4.014 times the minimum shank diameter and 2.880 times the maximum shank diameter. The minor crown height 29 of between 0.021 times the minimum shank diameter and 0.031 times the maximum shank diameter. The underhead surface 32 taper angle 34 is between 102 and 103 degrees. The land 24 has a width 37 between 0.021 times the minimum shank diameter 18 and 0.012 times the maximum shank diameter.

Abstract: The invention is a protruding-head rivet for joining two or more structural elements together which, when driven, using all standard driving tools, provide a controlled expansion of the hole. The protruding-head rivet 10 has a shank 12 having a nominal diameter 18. The head diameter 24 is between 1.642 times the minimum shank diameter 18 and 1.706 times the maximum shank diameter. The head has a center spherical radius 26 of between 1.320 times the minimum shank diameter and 1.406 times the maximum shank diameter and a head outer spherical radius 30 of between 0.321 times the minimum shank diameter 18 and 0.353 times the maximum shank diameter. The underhead surface downward directed angle 36 is between 5 and 6 degrees. The head height 22 is between 0.455 times the minimum shank diameter 18 and 0.479 times the maximum shank diameter.The radius 38 between the protruding head and the shank is between 0.050 times the minimum shank diameter and 0.

Abstract: The invention is a blind fastener of the type having a hollow sleeve, spindle, and locking collar. The fastener differs from conventional blind fasteners in that the spindle has a cold work mandrel portion between the pull stem and shear pin portions thereof. Furthermore, all the principle dimensions and tolerances thereof are based on the sleeve shank outer diameter. The more important dimensions are the sleeve inside diameter of between 0.9000 times the minimum sleeve outer diameter and 0.8964 times the maximum sleeve outer diameter, the shear pin diameter of the spindle is between 0.9632 times the minimum sleeve outer diameter and 0.9534 times the maximum sleeve outer diameter and the tapered cold work mandrel portion larger diameter is between 0.9684 times the minimum sleeve shank outer diameter and 0.9585 times the maximum sleeve outer diameter.