| BODY STYLE | UNSHIELDED,SOLID OR THREADED POST,GASKET SEAT |
| USAGE DESIGN | ENGINE OTHER THAN AIRCRAFT |
| ELECTRODE STYLE | SINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4) |
| REACH LENGTH | 0.375 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.812 INCHES NOMINAL |
| SEAT MAJOR DIAMETER | 0.812 INCHES MAXIMUM |
| MEAN EFFECTIVE PRESSURE RATING | 253.0 POUNDS PER SQUARE INCH NOMINAL |
| NONDEFINITIVE SPEC/STD DATA | 3 TYPE AND |
| B CLASS |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81348 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | WS506 |