TWO EMPLOYEE'S WERE STACKING PIPE ON THE FLATBED. INJURED WAS PUSHING 7"" PIPE TO THE END OF THE BED, AFTER IT WAS LAID DOWN. THE PREVIOUS PIPE WAS NOT PUSHED ALL THE WAY IN, IT STUCK OUT 2.5"". WHEN HE PUSHED THE 7"" PIECE OF PIPE TO THE END OF THE BED, HIS MIDDLE RIGHT FINGER WAS PINCHED IN BETWEEN THE LIFTING PLUG AND THE PIPE THAT WAS STICKING OUT 2.5"".