EMPLOYEE WAS INSERTING A PIN INTO THE DUMP SOCKET OF A DRAGLINE BUCKET. HE HAD SOME DIFFICULTY GETTING THE PIN LINED UP. AS HE MANEUVERED IT INTO POSITION, IT SUDDENLY FELL INTO PLACE. WHEN TH IS HAPPENED, IT PINCHED HIS MIDDLE FINGER ON HISLEFT HAND. THIS INCIDENT RESULTED IN A FRACTURE TO HIS FINGER AND RESTRICTED DUTY.