| ACCOMMODATED SPARK PLUG THREAD DIAMETER | 18.0 MILLIMETERS NOMINAL |
| BOTTOM END COUNTERBORE DEPTH | 0.290 INCHES NOMINAL |
| BOTTOM END COUNTERBORE DIAMETER | 0.690 INCHES NOMINAL |
| FURNISHED ITEMS | HEAD AND COUNTERBORE FEATURE |
| HEAD DIAMETER | 1.220 INCHES MINIMUM AND 1.260 INCHES MAXIMUM |
| HEAD HEIGHT | 0.089 INCHES MINIMUM AND 0.099 INCHES MAXIMUM |
| OUTSIDE THREAD DIAMETER | 1.000 INCHES NOMINAL |
| OVERALL LENGTH | 0.716 INCHES MINIMUM AND 0.736 INCHES MAXIMUM |
| MATERIAL | COPPER ALLOY BODY |