| DISTANCE FROM FIRST GROOVE TO STEM END | 0.2500 INCHES NOMINAL |
| DISTANCE FROM SECOND GROOVE TO STEM END | 0.5937 INCHES NOMINAL |
| CARBON RELIEF GROOVE | NOT INCLUDED |
| CHAMFER ANGLE IN DEG | 60.0 |
| CHAMFER LENGTH | 0.0312 INCHES NOMINAL |
| FIRST GROOVE WIDTH | 0.0625 INCHES NOMINAL |
| FIRST GROOVE DIAMETER | 0.4290 INCHES MINIMUM AND 0.4340 INCHES MAXIMUM |
| FSC APPLICATION DATA | GASOLINE ENGINE |
| HEAD HEIGHT | 0.1719 INCHES NOMINAL |
| HEAD STYLE | MUSHROOM |
| OUTSIDE DIAMETER | 1.8437 INCHES MINIMUM AND 1.8587 INCHES MAXIMUM |
| METALLIC HARDNESS RATING AND LOCATION | 35.0 ROCKWELL C MINIMUM STEM |
| METALLIC HARDNESS RATING AND LOCATION | 45.0 ROCKWELL C MAXIMUM STEM |
| METALLIC HARDNESS RATING AND LOCATION | 48.0 ROCKWELL C NOMINAL TIP |
| NECK RADIUS | 0.3750 INCHES NOMINAL |
| SEAT ANGLE IN DEG | 45.0 |
| SECOND GROOVE DIAMETER | 0.4290 INCHES MINIMUM AND 0.4340 INCHES MAXIMUM |
| SECOND GROOVE WIDTH | 0.0625 INCHES NOMINAL |
| STEM DIAMETER | 0.4955 INCHES MINIMUM AND 0.4965 INCHES MAXIMUM |
| STEM LENGTH | 8.0313 INCHES NOMINAL |
| STEM STYLE | DOUBLE GROOVED |