| MATERIAL AND LOCATION | STEEL, FED STD 66, SAE HNV4 OVERALL |
| METALLIC HARDNESS RATING AND LOCATION | 42.0 ROCKWELL C NOMINAL TIP |
| HEAD STYLE | INVERTED CONE |
| HEAD HEIGHT | 0.1650 INCHES MINIMUM AND |
| 0.1800 INCHES MAXIMUM |
| OUTSIDE DIAMETER | 1.4640 INCHES MINIMUM AND |
| 1.4740 INCHES MAXIMUM |
| NECK RADIUS | 0.3440 INCHES NOMINAL |
| SEAT ANGLE IN DEG | 30.0 |
| GROOVE DIAMETER | 0.3000 INCHES MINIMUM AND |
| 0.3060 INCHES MAXIMUM |
| CHAMFER LENGTH | 0.0310 INCHES MINIMUM AND |
| 0.1600 INCHES MAXIMUM |
| GROOVE WIDTH | 0.0950 INCHES MINIMUM AND |
| 0.1050 INCHES MAXIMUM |
| STEM DIAMETER | 0.3400 INCHES MINIMUM AND |
| 0.3407 INCHES MAXIMUM |
| DISTANCE FROM GROOVE TO STEM END | 0.4649 INCHES MINIMUM AND |
| 0.4749 INCHES MAXIMUM |
| CHAMFER ANGLE IN DEG | 45.0 |
| CARBON RELIEF GROOVE | NOT INCLUDED |
| FSC APPLICATION DATA | GASOLINE ENGINE |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 7X677 |
| DESIGN CONTROL REFERENCE | 3835318 |