| MATERIAL AND LOCATION | STEEL, FED STD 66, AISI/SAE 3140 OVERALL |
| METALLIC HARDNESS RATING AND LOCATION | 36.6 ROCKWELL C MINIMUM TIP |
| 45.1 ROCKWELL C MAXIMUM TIP |
| HEAD STYLE | FLAT |
| HEAD HEIGHT | 0.1498 INCHES MINIMUM AND |
| 0.1698 INCHES MAXIMUM |
| OUTSIDE DIAMETER | 1.5100 INCHES MINIMUM AND |
| 1.5200 INCHES MAXIMUM |
| NECK RADIUS | 0.3125 INCHES NOMINAL |
| SEAT ANGLE IN DEG | 44.0 |
| STEM STYLE | GROOVED |
| GROOVE DIAMETER | 0.3590 INCHES MINIMUM AND |
| 0.3650 INCHES MAXIMUM |
| CHAMFER LENGTH | 0.0502 INCHES MINIMUM AND |
| 0.0519 INCHES MAXIMUM |
| GROOVE WIDTH | 0.1320 INCHES MINIMUM AND |
| 0.1420 INCHES MAXIMUM |
| STEM LENGTH | 6.7850 INCHES MINIMUM AND |
| 6.8300 INCHES MAXIMUM |
| STEM DIAMETER | 0.4344 INCHES MINIMUM AND |
| 0.4352 INCHES MAXIMUM |
| DISTANCE FROM GROOVE TO STEM END | 0.5781 INCHES NOMINAL |
| CHAMFER ANGLE IN DEG | 30.0 |
| CARBON RELIEF GROOVE | NOT INCLUDED |
| DEPARTURE FROM CITED DOCUMENT | PARAGRAPH 3.8.3 |
| FSC APPLICATION DATA | DIESEL ENGINE |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81349 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MILE11276 |