V90 L6-2.9L VIN 96 B6304S (1998)
Identifying screw types
Older screw to left of illustration
Older screws from factory have M9 x 1.25 angle of thread and have no markings on the screw head.
Old screws as replacement part (P/N 1271900-1) have a circular stamp in the screw head.
New screw to right of illustration
New screws from factory have closer M9 x 1.0 angle of thread and have no markings on the screw head.
New screws as replacement part (P/N 9125471-4) have a triangular stamp in the screw head.
Thread gauge
Thread gauges can also be used to check which type of screw is used. This may be required if there is no marking on the screw head.
