An assembly (30, 70) comprising: a rotor drive key (12, 74, 170) configured to be positioned over a wheel boss (72, 73, 123, 144, 148, 152) of a wheel (10, 142), wherein the rotor drive key (12, 74, 170) defines a key bearing surface (77, 174); and a fastener (80, 90, 100, 100, 140) configured to extend through the wheel boss (72, 73, 123, 144, 148, 152) when the rotor drive key (12, 74, 170) is positioned over the wheel boss (72, 73, 123, 144, 148, 152), wherein the fastener (80, 90, 100, 100, 140) comprises a shank (82, 92, 102, 156) defining a shank surface (84, 94, 104), wherein the shank surface (84, 94, 104) is configured to contact the key bearing surface (77, 174) of the rotor drive key (12, 74, 170) when the fastener (80, 90, 100, 100, 140) extends through the wheel boss (72, 73, 123, 144, 148, 152), and wherein the fastener (80, 90, 100, 100, 140) is configured to limit movement of the rotor drive key (12, 74, 170) relative to the wheel boss (72, 73, 123, 144, 148, 152) characterized in that the fastener shank (82, 92, 102, 156) defines a fastener axis and the shank surface (84, 94, 104) defines a displacement from the fastener axis to the shank surface (84, 94, 104) and perpendicular to the fastener axis, wherein the displacement varies from a minimum displacement to a maximum displacement greater than the minimum displacement. a rotor drive key (12, 74, 170) configured to be positioned over a wheel boss (72, 73, 123, 144, 148, 152) of a wheel (10, 142), wherein the rotor drive key (12, 74, 170) defines a key bearing surface (77, 174); and a fastener (80, 90, 100, 100, 140) configured to extend through the wheel boss (72, 73, 123, 144, 148, 152) when the rotor drive key (12, 74, 170) is positioned over the wheel boss (72, 73, 123, 144, 148, 152), wherein the fastener (80, 90, 100, 100, 140) comprises a shank (82, 92, 102, 156) defining a shank surface (84, 94, 104), wherein the shank surface (84, 94, 104) is configured to contact the key bearing surface (77, 174) of the rotor drive key (12, 74, 170) when the fastener (80, 90, 100, 100, 140) extends through the wheel boss (72, 73, 123, 144, 148, 152), and wherein the fastener (80, 90, 100, 100, 140) is configured to limit movement of the rotor drive key (12, 74, 170) relative to the wheel boss (72, 73, 123, 144, 148, 152) characterized in that the fastener shank (82, 92, 102, 156) defines a fastener axis and the shank surface (84, 94, 104) defines a displacement from the fastener axis to the shank surface (84, 94, 104) and perpendicular to the fastener axis, wherein the displacement varies from a minimum displacement to a maximum displacement greater than the minimum displacement. wherein the fastener (80, 90, 100, 100, 140) comprises a shank (82, 92, 102, 156) defining a shank surface (84, 94, 104), wherein the shank surface (84, 94, 104) is configured to contact the key bearing surface (77, 174) of the rotor drive key (12, 74, 170) when the fastener (80, 90, 100, 100, 140) extends through the wheel boss (72, 73, 123, 144, 148, 152), and wherein the fastener (80, 90, 100, 100, 140) is configured to limit movement of the rotor drive key (12, 74, 170) relative to the wheel boss (72, 73, 123, 144, 148, 152) characterized in that the fastener shank (82, 92, 102, 156) defines a fastener axis and the shank surface (84, 94, 104) defines a displacement from the fastener axis to the shank surface (84, 94, 104) and perpendicular to the fastener axis, wherein the displacement varies from a minimum displacement to a maximum displacement greater than the minimum displacement.