| MATERIAL AND LOCATION | STEEL, FED STD 66, AISI/SAE 3140 OVERALL |
| METALLIC HARDNESS RATING AND LOCATION | 37.0 ROCKWELL C NOMINAL TIP |
| HEAD STYLE | CONCAVE |
| HEAD HEIGHT | 0.1690 INCHES NOMINAL |
| OUTSIDE DIAMETER | 2.0625 INCHES NOMINAL |
| NECK RADIUS | 0.5000 INCHES NOMINAL |
| SEAT ANGLE IN DEG | 30.0 |
| STEM STYLE | DOUBLE GROOVED |
| CHAMFER LENGTH | 0.0312 INCHES NOMINAL |
| STEM LENGTH | 5.7500 INCHES NOMINAL |
| STEM DIAMETER | 0.3720 INCHES MINIMUM AND |
| 0.3730 INCHES MAXIMUM |
| DISTANCE FROM FIRST GROOVE TO STEM END | 0.2812 INCHES NOMINAL |
| DISTANCE FROM SECOND GROOVE TO STEM END | 0.4360 INCHES MINIMUM AND |
| 0.4380 INCHES MAXIMUM |
| FIRST GROOVE DIAMETER | 0.3010 INCHES MINIMUM AND |
| 0.3070 INCHES MAXIMUM |
| SECOND GROOVE DIAMETER | 0.3010 INCHES MINIMUM AND |
| 0.3070 INCHES MAXIMUM |
| FIRST GROOVE WIDTH | 0.0600 INCHES MINIMUM AND |
| 0.0640 INCHES MAXIMUM |
| SECOND GROOVE WIDTH | 0.0600 INCHES MINIMUM AND |
| 0.0640 INCHES MAXIMUM |
| CHAMFER ANGLE IN DEG | 45.0 |
| CARBON RELIEF GROOVE | NOT INCLUDED |
| FSC APPLICATION DATA | GASOLINE ENGINE |