| DISTANCE FROM GROOVE TO STEM END | 0.2400 INCHES MINIMUM AND 0.2600 INCHES MAXIMUM |
| CARBON RELIEF GROOVE | INCLUDED |
| CHAMFER ANGLE IN DEG | 30.0 |
| CHAMFER LENGTH | 0.0312 INCHES NOMINAL |
| FSC APPLICATION DATA | GASOLINE ENGINE |
| GROOVE DIAMETER | 0.2520 INCHES MINIMUM AND 0.2570 INCHES MAXIMUM |
| GROOVE WIDTH | 0.4270 INCHES MINIMUM AND 0.4470 INCHES MAXIMUM |
| HEAD HEIGHT | 0.2080 INCHES MINIMUM AND 0.2280 INCHES MAXIMUM |
| HEAD STYLE | MUSHROOM |
| III MATERIAL AND LOCATION | STEEL, FED STD 66, AISI/SAE 3140 OVERALL |
| PROPRIETARY CHARACTERISTICS | PACS |
| METALLIC HARDNESS RATING AND LOCATION | 35.0 ROCKWELL C MINIMUM OVERALL ERR-100 |
| METALLIC HARDNESS RATING AND LOCATION | 45.0 ROCKWELL C MAXIMUM OVERALL ERR-100 |
| NECK RADIUS | 0.3750 INCHES NOMINAL |
| OUTSIDE DIAMETER | 2.1562 INCHES MINIMUM AND 2.1712 INCHES MAXIMUM |
| SEAT ANGLE IN DEG | 30.0 |
| STEM DIAMETER | 0.3720 INCHES MINIMUM AND 0.3730 INCHES MAXIMUM |
| STEM LENGTH | 6.9580 INCHES MINIMUM AND 6.9780 INCHES MAXIMUM |
| STEM STYLE | GROOVED |