Patent ID: 8215885

Claim:
A joint comprising: a pair of workpieces at least one of which is a composite laminar workpiece, each said workpiece having a through-hole, the composite laminar workpiece further having a drilled washer locking hole of a diameter smaller than that of the through-hole of the composite laminar workpiece; a fastener passing through the workpieces; a washer having at least one locking hole, said washer is fitted to the fastener and has a washer locking member extending from the washer into the washer locking hole of the composite laminar workpiece so as to lock the washer against rotation relative to the composite laminar workpiece; and a nut having at least one locking hole, said nut engages with the fastener to fasten the workpieces together, clamps the washer against the composite laminar workpiece, a locking pin, comprising: a shaft which is received in the aligned said at least one washer locking hole and said at least one nut locking hole, without extending into said composite laminar workpiece, for locking the nut against rotation relative to the washer; and, a head which engages an upper side of said nut, whereas an underside of said nut presses the washer toward the workpieces; wherein the workpieces are parts of an aircraft; and wherein the composite laminar workpiece is made from a material selected from the group consisting of carbon-fiber reinforced polymer (CFRP), glass-fiber reinforced polymer, and fiber metal laminate (FML).