| MATERIAL AND LOCATION | STEEL, FED STD 66, AISI/SAE 3140 OVERALL |
| METALLIC HARDNESS RATING AND LOCATION | 30.0 ROCKWELL C MINIMUM HEAD |
| 40.0 ROCKWELL C MAXIMUM HEAD |
| 30.0 ROCKWELL C MINIMUM STEM |
| 40.0 ROCKWELL C MAXIMUM STEM |
| 60.0 SHORE SCLEROSCOPE MINIMUM TIP |
| HEAD STYLE | FLAT |
| OUTSIDE DIAMETER | 1.1200 INCHES MINIMUM AND |
| 1.1350 INCHES MAXIMUM |
| NECK RADIUS | 0.2500 INCHES NOMINAL |
| SEAT ANGLE IN DEG | 45.0 |
| STEM STYLE | DOUBLE GROOVED |
| CHAMFER LENGTH | 0.0312 INCHES NOMINAL |
| STEM DIAMETER | 0.3100 INCHES MINIMUM AND |
| 0.3110 INCHES MAXIMUM |
| DISTANCE FROM FIRST GROOVE TO STEM END | 0.2187 INCHES NOMINAL |
| DISTANCE FROM SECOND GROOVE TO STEM END | 0.3750 INCHES NOMINAL |
| FIRST GROOVE DIAMETER | 0.2400 INCHES MINIMUM AND |
| 0.2460 INCHES MAXIMUM |
| SECOND GROOVE DIAMETER | 0.2400 INCHES MINIMUM AND |
| 0.2460 INCHES MAXIMUM |
| FIRST GROOVE WIDTH | 0.0625 INCHES NOMINAL |
| SECOND GROOVE WIDTH | 0.0625 INCHES NOMINAL |
| CHAMFER ANGLE IN DEG | 60.0 |
| CARBON RELIEF GROOVE | NOT INCLUDED |
| FSC APPLICATION DATA | GASOLINE ENGINE |