| BODY STYLE | ELECTRICALLY SHIELDED, PARTIAL INSULATOR, GASKET SEAT |
| USAGE DESIGN | ENGINE OTHER THAN AIRCRAFT |
| ELECTRODE STYLE | SINGLE ROUND GROUND ELECTRODE |
| THREAD SIZE AND SERIES/TYPE DESIGNATOR | 7/8-18 UNS BASE |
| 5/8-24 UNEF SHIELD |
| REACH LENGTH | 0.625 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 1.125 INCHES NOMINAL |
| SEAT MAJOR DIAMETER | 1.125 INCHES NOMINAL |
| HEIGHT ABOVE MOUNTING SURFACE | 2.570 INCHES NOMINAL |
| TOP TO TERMINAL CONTACT DISTANCE | 1.000 INCHES MINIMUM AND |
| 1.070 INCHES MAXIMUM |
| TOP TO SHIELD THREAD DISTANCE | 0.125 INCHES NOMINAL |
| SHIELD THREAD LENGTH | 0.250 INCHES NOMINAL |
| BARREL INSIDE DIAMETER | 0.459 INCHES NOMINAL |
| TERMINAL SLEEVE INSIDE DIAMETER | 0.378 INCHES MINIMUM AND |
| 0.388 INCHES MAXIMUM |
| MEAN EFFECTIVE PRESSURE RATING | 85.0 POUNDS PER SQUARE INCH MINIMUM AND |
| 115.0 POUNDS PER SQUARE INCH MAXIMUM |
| DC RESISTANCE RATING IN OHMS | 10000.0 NOMINAL |
| NONDEFINITIVE SPEC/STD DATA | 2 TYPE AND |
| A CLASS |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81348 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | WS506 |