| BODY STYLE | ELECTRICALLY SHIELDED, PARTIAL INSULATOR, GASKET SEAT |
| USAGE DESIGN | AIRCRAFT ENGINE |
| ELECTRODE STYLE | TRIPLE 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 | 0.870 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 | 1.485 INCHES MINIMUM AND |
| 1.585 INCHES MAXIMUM |
| 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 | 0.560 INCHES NOMINAL |
| TERMINAL SLEEVE INSIDE DIAMETER | 0.378 INCHES MINIMUM AND |
| 0.398 INCHES MAXIMUM |
| MEAN EFFECTIVE PRESSURE RATING | 415.0 POUNDS PER SQUARE INCH NOMINAL |
| DC RESISTANCE RATING IN OHMS | 1500.0 NOMINAL |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 70040 |
| DESIGN CONTROL REFERENCE | AC275 |