Northwest Short Line NWSL 487-6 Driveline Universal Connector

Driveline Universal Connector 1.5mm Shaft (4 Sockets)
        "Dog Bone" Ball Diameter: 3/32"
        Horned Ball ID: 1.5mm D*
        Minimum Length: 9mm(0.354")

D* - May have to file or grind a matching flat on shaft to fit