| ELECTRODE STYLE | FOUR GAP GROUND ELECTRODE |
| BARREL INSIDE DIAMETER | 0.650 INCHES NOMINAL |
| BODY STYLE | ELECTRICALLY SHIELDED, PARTIAL INSULATOR, GASKET SEAT |
| DC RESISTANCE RATING IN OHMS | 500.0 MINIMUM AND 1500.0 MAXIMUM |
| HEIGHT ABOVE MOUNTING SURFACE | 2.434 INCHES NOMINAL |
| PRECIOUS MATERIAL AND LOCATION | FINE WIRE ELECTRODE IRIDIUM |
| REACH LENGTH | 0.802 INCHES NOMINAL |
| SEAT MAJOR DIAMETER | 0.970 INCHES NOMINAL |
| SHIELD THREAD LENGTH | 0.460 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.875 INCHES NOMINAL |
| TERMINAL SLEEVE INSIDE DIAMETER | 0.565 INCHES NOMINAL |
| THREAD SIZE AND SERIES/TYPE DESIGNATOR | 3/4-20 UNEF SHIELD |
| TOP TO SHIELD THREAD DISTANCE | 0.040 INCHES NOMINAL |
| TOP TO TERMINAL CONTACT DISTANCE | 1.500 INCHES NOMINAL |
| USAGE DESIGN | AIRCRAFT ENGINE |