| BODY STYLE | ELECTRICALLY SHIELDED, PARTIAL INSULATOR, GASKET SEAT |
| USAGE DESIGN | AIRCRAFT ENGINE |
| ELECTRODE STYLE | TWO FLAT 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 | 0.870 INCHES MINIMUM AND |
| 0.878 INCHES MAXIMUM |
| SEAT MAJOR DIAMETER | 0.950 INCHES MINIMUM AND |
| 0.970 INCHES MAXIMUM |
| HEIGHT ABOVE MOUNTING SURFACE | 2.438 INCHES MINIMUM AND |
| 2.562 INCHES MAXIMUM |
| TOP TO TERMINAL CONTACT DISTANCE | 1.480 INCHES MINIMUM AND |
| 1.570 INCHES MAXIMUM |
| TOP TO SHIELD THREAD DISTANCE | 0.105 INCHES MINIMUM AND |
| 0.145 INCHES MAXIMUM |
| SHIELD THREAD LENGTH | 0.335 INCHES MAXIMUM |
| BARREL INSIDE DIAMETER | 0.555 INCHES MINIMUM AND |
| 0.565 INCHES MAXIMUM |
| TERMINAL SLEEVE INSIDE DIAMETER | 0.378 INCHES MINIMUM AND |
| 0.398 INCHES MAXIMUM |
| SPECIAL FEATURES | FINE WIRE (PLATINUM) ELECTRODES,0.015 IN. MIN,0.018 IN. MAX GAP |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE |
| SPEC/STD CONTROLLING DATA | |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MILS7886 |
| MANUFACTURERS CODE | 81349 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MILS7886-1002 |