| BODY STYLE | ELECTRICALLY SHIELDED, FULL INSULATOR, GASKET SEAT |
| USAGE DESIGN | ENGINE OTHER THAN AIRCRAFT |
| ELECTRODE STYLE | TWO FLAT GROUND ELECTRODE |
| THREAD SIZE AND SERIES/TYPE DESIGNATOR | 5/8-24 UNEF SHIELD |
| REACH LENGTH | 0.500 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.813 INCHES NOMINAL |
| SEAT MAJOR DIAMETER | 0.790 INCHES NOMINAL |
| HEIGHT ABOVE MOUNTING SURFACE | 2.690 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 |
| TERMINAL SLEEVE INSIDE DIAMETER | 0.378 INCHES MINIMUM AND |
| 0.388 INCHES MAXIMUM |
| MEAN EFFECTIVE PRESSURE RATING | 230.0 POUNDS PER SQUARE INCH NOMINAL |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 0B231 |
| DESIGN CONTROL REFERENCE | REL88B |