| DISTANCE FROM MINOR DIAMETER TO STEM END | 0.2130 INCHES MINIMUM AND 0.2280 INCHES MAXIMUM |
| CARBON RELIEF GROOVE | NOT INCLUDED |
| CHAMFER ANGLE IN DEG | 30.0 |
| CHAMFER LENGTH | 0.0090 INCHES MINIMUM AND 0.0350 INCHES MAXIMUM |
| FSC APPLICATION DATA | GASOLINE ENGINE |
| HEAD HEIGHT | 0.1350 INCHES NOMINAL |
| HEAD STYLE | CONCAVE |
| III MATERIAL AND LOCATION | STEEL, FED STD 66, SAE HNV4 STEM |
| III MATERIAL AND LOCATION | STEEL, FED STD 66, SAE EV6 HEAD |
| PROPRIETARY CHARACTERISTICS | PACS |
| METALLIC HARDNESS RATING AND LOCATION | 20.0 ROCKWELL C NOMINAL HEAD ERR-100 |
| METALLIC HARDNESS RATING AND LOCATION | 35.0 ROCKWELL C NOMINAL STEM ERR-100 |
| METALLIC HARDNESS RATING AND LOCATION | 43.0 ROCKWELL C NOMINAL TIP ERR-100 |
| MINOR OUTSIDE DIAMETER | 0.3170 INCHES MINIMUM AND 0.3330 INCHES MAXIMUM |
| MINOR DIAMETER LENGTH | 0.0950 INCHES MINIMUM AND 0.1050 INCHES MAXIMUM |
| NECK RADIUS | 0.3200 INCHES NOMINAL |
| OUTSIDE DIAMETER | 1.7750 INCHES MINIMUM AND 1.7850 INCHES MAXIMUM |
| SEAT ANGLE IN DEG | 45.0 |
| STEM DIAMETER | 0.3710 INCHES MINIMUM AND 0.3720 INCHES MAXIMUM |
| STEM LENGTH | 4.9300 INCHES MINIMUM AND 4.9450 INCHES MAXIMUM |
| STEM STYLE | TAPERED |
| TAPER ANGLE IN DEG | 25.0 |