| CASEHARDENING INDICATOR | NOT CASEHARDENED |
| CHAMFER LENGTH | 0.073 INCHES MINIMUM AND 0.088 INCHES MAXIMUM |
| FSC APPLICATION DATA | CYLINDER HEAD ASSEMBLY,GASOLINE ENGINE NONAIRCRAFT |
| LARGEST BOTTOM COUNTERSINK DIAMETER | 0.416 INCHES MINIMUM AND 0.436 INCHES MAXIMUM |
| LARGEST TOP COUNTERSINK DIAMETER | 0.416 INCHES MINIMUM AND 0.436 INCHES MAXIMUM |
| LARGEST OUTSIDE DIAMETER CHAMFER ANGLE IN DEG | 45.0 |
| LARGEST OUTSIDE DIAMETER | 0.677 INCHES MINIMUM AND 0.682 INCHES MAXIMUM |
| OVERALL HEIGHT | 0.124 INCHES MINIMUM AND 0.125 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE 52100/D/ ASSN STD SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL COMP E52100 |
| METALLIC HARDNESS RATING | 60.0 MINIMUM ROCKWELL C |
| MINIMUM INSIDE DIAMETER | 0.343 INCHES |
| STYLE DESIGNATOR | STRAIGHT BORE-ALL CORNERS CHAMFERED-STRAIGHT SIDES |
| THREAD PROVISION | UNTHREADED |