| MATERIAL AND LOCATION | STEEL OVERALL |
| METALLIC HARDNESS RATING AND LOCATION | 57.0 ROCKWELL C NOMINAL HEAD |
| 50.0 ROCKWELL C MINIMUM STEM |
| 55.0 ROCKWELL C MAXIMUM STEM |
| 50.0 ROCKWELL C MINIMUM TIP |
| 55.0 ROCKWELL C MAXIMUM TIP |
| HEAD STYLE | FLAT |
| HEAD HEIGHT | 0.1600 INCHES MINIMUM AND |
| 0.1750 INCHES MAXIMUM |
| OUTSIDE DIAMETER | 1.3540 INCHES MINIMUM AND |
| 1.3650 INCHES MAXIMUM |
| NECK RADIUS | 0.2500 INCHES NOMINAL |
| SEAT ANGLE IN DEG | 30.0 |
| STEM STYLE | TAPERED |
| CHAMFER LENGTH | 0.0300 INCHES NOMINAL |
| MINOR OUTSIDE DIAMETER | 0.1875 INCHES NOMINAL |
| MINOR DIAMETER LENGTH | 0.1875 INCHES NOMINAL |
| STEM LENGTH | 3.6615 INCHES MINIMUM AND |
| 3.6765 INCHES MAXIMUM |
| STEM DIAMETER | 0.13099 INCHES MINIMUM AND |
| 0.3105 INCHES MAXIMUM |
| DISTANCE FROM MINOR DIAMETER TO STEM END | 0.1875 INCHES NOMINAL |
| CHAMFER ANGLE IN DEG | 45.0 |
| TAPER ANGLE IN DEG | 15.0 |
| CARBON RELIEF GROOVE | NOT INCLUDED |
| FSC APPLICATION DATA | GASOLINE ENGINE |