| EIA ELECTRON TUBE ENVELOPE ACCOMMODATED | T3 3-1 |
| ACCOMMODATED ITEM SECURING DEVICE TYPE | FRICTION FASTENER |
| DISTANCE BETWEEN MOUNTING FACILITY CENTERS | 0.300 INCHES NOMINAL SINGLE MOUNTING FACILITY FIRST CENTER GROUP |
| DISTANCE BETWEEN MOUNTING FACILITY CENTERS | 1.100 INCHES NOMINAL SINGLE MOUNTING FACILITY SECOND CENTER GROUP |
| OVERALL HEIGHT | 0.469 INCHES NOMINAL |
| OVERALL LENGTH | 1.312 INCHES NOMINAL |
| OVERALL WIDTH | 0.500 INCHES NOMINAL |
| MATERIAL | COPPER |
| MOUNTING FACILITY TYPE AND QUANTITY | 4 UNTHREADED HOLE SINGLE MOUNTING FACILITY |
| STYLE DESIGNATOR | IRREGULAR |
| UNTHREADED MOUNTING HOLE DIAMETER | 0.078 INCHES NOMINAL SINGLE MOUNTING FACILITY |