EMPLOYEE WAS ATTEMPTING TO OBTAIN A PRODUCT SAMPLE FROM A SAMPLE PORT (2"" PIPE EXTENDING FROM SCREW CONVEYOR AT #3 TANK). HE FOUND THE PIPE WAS PLUGGED, THEREFORE HE ATTEMPTED TO CLEAN OUT THE END OF IT BY INSERTING HIS RIGHT INDEX FINGER INTO THE PIPE. THE SCREW CAUGHT HIS FINGER, CAUSING A DEEP LACERATION AND FRACTURE.