| MATERIAL AND LOCATION | STEEL, FED STD 66, SAE HNV3 OVERALL |
| METALLIC HARDNESS RATING AND LOCATION | 37.0 ROCKWELL C MINIMUM HEAD |
| 44.0 ROCKWELL C MAXIMUM HEAD |
| 37.0 ROCKWELL C MINIMUM SEAT FACE |
| 44.0 ROCKWELL C MAXIMUM SEAT FACE |
| 37.0 ROCKWELL C MINIMUM STEM |
| 44.0 ROCKWELL C MAXIMUM STEM |
| 47.0 ROCKWELL C NOMINAL TIP |
| HEAD STYLE | FLAT |
| HEAD HEIGHT | 0.2500 INCHES MINIMUM AND |
| 0.2800 INCHES MAXIMUM |
| OUTSIDE DIAMETER | 1.9980 INCHES MINIMUM AND |
| 2.0020 INCHES MAXIMUM |
| NECK RADIUS | 0.4375 INCHES NOMINAL |
| SEAT ANGLE IN DEG | 45.0 |
| CHAMFER LENGTH | 0.0312 INCHES NOMINAL |
| STEM LENGTH | 6.4580 INCHES MINIMUM AND |
| 6.4680 INCHES MAXIMUM |
| STEM DIAMETER | 0.4970 INCHES MINIMUM AND |
| 0.4990 INCHES MAXIMUM |
| DISTANCE FROM FIRST GROOVE TO STEM END | 0.3610 INCHES MINIMUM AND |
| 0.3710 INCHES MAXIMUM |
| DISTANCE FROM SECOND GROOVE TO STEM END | 0.5216 INCHES MINIMUM AND |
| 0.5316 INCHES MAXIMUM |
| DISTANCE FROM THIRD GROOVE TO STEM END | 0.6822 INCHES MINIMUM AND |
| 0.6922 INCHES MAXIMUM |
| FIRST GROOVE DIAMETER | 0.3900 INCHES MINIMUM AND |
| 0.3950 INCHES MAXIMUM |
| SECOND GROOVE DIAMETER | 0.3900 INCHES MINIMUM AND |
| 0.3950 INCHES MAXIMUM |
| THIRD GROOVE DIAMETER | 0.3900 INCHES MINIMUM AND |
| 0.3950 INCHES MAXIMUM |
| FIRST GROOVE WIDTH | 0.0970 INCHES MINIMUM AND |
| 0.1010 INCHES MAXIMUM |
| SECOND GROOVE WIDTH | 0.0970 INCHES MINIMUM AND |
| 0.1010 INCHES MAXIMUM |
| THIRD GROOVE WIDTH | 0.0970 INCHES MINIMUM AND |
| 0.1010 INCHES MAXIMUM |
| CHAMFER ANGLE IN DEG | 45.0 |
| CARBON RELIEF GROOVE | NOT INCLUDED |
| FSC APPLICATION DATA | DIESEL ENGINE |