| BODY STYLE | ELECTRICALLY SHIELDED, PARTIAL INSULATOR, GASKET SEAT |
| USAGE DESIGN | ENGINE OTHER THAN AIRCRAFT |
| ELECTRODE STYLE | FOUR GAP GROUND ELECTRODE |
| THREAD SIZE AND SERIES/TYPE DESIGNATOR | 3/4-20 UNEF SHIELD |
| REACH LENGTH | 0.792 INCHES MINIMUM AND |
| 0.812 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.872 INCHES MINIMUM AND |
| 0.878 INCHES MAXIMUM |
| SEAT MAJOR DIAMETER | 0.970 INCHES MAXIMUM |
| HEIGHT ABOVE MOUNTING SURFACE | 2.469 INCHES MINIMUM AND |
| 2.531 INCHES MAXIMUM |
| TOP TO TERMINAL CONTACT DISTANCE | 1.500 INCHES NOMINAL |
| TOP TO SHIELD THREAD DISTANCE | 0.105 INCHES MINIMUM AND |
| 0.145 INCHES MAXIMUM |
| SHIELD THREAD LENGTH | 0.335 INCHES MINIMUM AND |
| 0.375 INCHES MAXIMUM |
| BARREL INSIDE DIAMETER | 0.378 INCHES MINIMUM AND |
| 0.386 INCHES MAXIMUM |
| TERMINAL SLEEVE INSIDE DIAMETER | 0.290 INCHES NOMINAL |
| MEAN EFFECTIVE PRESSURE RATING | 300.0 POUNDS PER SQUARE INCH NOMINAL |
| DC RESISTANCE RATING IN OHMS | 1000.0 NOMINAL |