| MATERIAL AND LOCATION | STEEL OVERALL |
| METALLIC HARDNESS RATING AND LOCATION | 30.0 ROCKWELL C MINIMUM HEAD |
| 40.0 ROCKWELL C MAXIMUM HEAD |
| 30.0 ROCKWELL C MINIMUM SEAT FACE |
| 40.0 ROCKWELL C MAXIMUM SEAT FACE |
| 30.0 ROCKWELL C MINIMUM STEM |
| 40.0 ROCKWELL C MAXIMUM STEM |
| 45.0 ROCKWELL C NOMINAL TIP |
| HEAD STYLE | FLAT |
| HEAD HEIGHT | 0.1400 INCHES MINIMUM AND |
| 0.1600 INCHES MAXIMUM |
| OUTSIDE DIAMETER | 1.7450 INCHES MINIMUM AND |
| 1.7550 INCHES MAXIMUM |
| NECK RADIUS | 0.3120 INCHES NOMINAL |
| SEAT ANGLE IN DEG | 45.0 |
| STEM STYLE | DOUBLE GROOVED |
| CHAMFER LENGTH | 0.0312 INCHES NOMINAL |
| STEM LENGTH | 4.5515 INCHES MINIMUM AND |
| 4.5965 INCHES MAXIMUM |
| STEM DIAMETER | 0.3415 INCHES MINIMUM AND |
| 0.3425 INCHES MAXIMUM |
| DISTANCE FROM FIRST GROOVE TO STEM END | 0.1830 INCHES NOMINAL |
| DISTANCE FROM SECOND GROOVE TO STEM END | 0.4540 INCHES NOMINAL |
| FIRST GROOVE DIAMETER | 0.2980 INCHES MINIMUM AND |
| 0.3040 INCHES MAXIMUM |
| SECOND GROOVE DIAMETER | 0.2740 INCHES MINIMUM AND |
| 0.2800 INCHES MAXIMUM |
| FIRST GROOVE WIDTH | 0.0950 INCHES MINIMUM AND |
| 0.1050 INCHES MAXIMUM |
| SECOND GROOVE WIDTH | 0.0390 INCHES MINIMUM AND |
| 0.0450 INCHES MAXIMUM |
| CHAMFER ANGLE IN DEG | 45.0 |
| CARBON RELIEF GROOVE | NOT INCLUDED |
| FSC APPLICATION DATA | GASOLINE ENGINE |