| ELECTRODE STYLE | TWO FLAT GROUND ELECTRODE |
| BARREL INSIDE DIAMETER | 0.555 INCHES MINIMUM AND 0.565 INCHES MAXIMUM |
| BODY STYLE | ELECTRICALLY SHIELDED, PARTIAL INSULATOR, GASKET SEAT |
| HEIGHT ABOVE MOUNTING SURFACE | 2.438 INCHES MINIMUM AND 2.562 INCHES MAXIMUM |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE |
| REACH LENGTH | 0.792 INCHES MINIMUM AND 0.812 INCHES MAXIMUM |
| SEAT MAJOR DIAMETER | 0.950 INCHES MINIMUM AND 0.970 INCHES MAXIMUM |
| SHIELD THREAD LENGTH | 0.335 INCHES MAXIMUM |
| SPECIAL FEATURES | FINE WIRE (PLATINUM) ELECTRODES,0.015 IN. MIN,0.018 IN. MAX GAP |
| WIDTH ACROSS FLATS | 0.870 INCHES MINIMUM AND 0.878 INCHES MAXIMUM |
| TERMINAL SLEEVE INSIDE DIAMETER | 0.378 INCHES MINIMUM AND 0.398 INCHES MAXIMUM |
| THREAD SIZE AND SERIES/TYPE DESIGNATOR | 3/4-20 UNEF SHIELD |
| TOP TO SHIELD THREAD DISTANCE | 0.105 INCHES MINIMUM AND 0.145 INCHES MAXIMUM |
| TOP TO TERMINAL CONTACT DISTANCE | 1.480 INCHES MINIMUM AND 1.570 INCHES MAXIMUM |
| USAGE DESIGN | AIRCRAFT ENGINE |