| MATERIAL AND LOCATION | COBALT ALLOY SEAT FACE |
| STEEL HEAD |
| STEEL STEM |
| METALLIC HARDNESS RATING AND LOCATION | 50.0 ROCKWELL C NOMINAL TIP |
| HEAD STYLE | FLAT |
| HEAD HEIGHT | 0.1820 INCHES MINIMUM AND |
| 0.1920 INCHES MAXIMUM |
| OUTSIDE DIAMETER | 1.8390 INCHES MINIMUM AND |
| 1.8490 INCHES MAXIMUM |
| NECK RADIUS | 0.3800 INCHES NOMINAL |
| SEAT ANGLE IN DEG | 45.0 |
| STEM STYLE | GROOVED |
| GROOVE DIAMETER | 0.3590 INCHES MINIMUM AND |
| 0.3650 INCHES MAXIMUM |
| CHAMFER LENGTH | 0.0312 INCHES NOMINAL |
| GROOVE WIDTH | 0.1560 INCHES MINIMUM AND |
| 0.1660 INCHES MAXIMUM |
| STEM LENGTH | 4.6140 INCHES MINIMUM AND |
| 4.6440 INCHES MAXIMUM |
| STEM DIAMETER | 0.4330 INCHES MINIMUM AND |
| 0.4340 INCHES MAXIMUM |
| DISTANCE FROM GROOVE TO STEM END | 0.3200 INCHES NOMINAL |
| CHAMFER ANGLE IN DEG | 45.0 |
| CARBON RELIEF GROOVE | NOT INCLUDED |
| FSC APPLICATION DATA | GASOLINE ENGINE AIRCRAFT |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 28839 |
| DESIGN CONTROL REFERENCE | 40651 |