| EIA ELECTRON TUBE ENVELOPE ACCOMMODATED | T12 |
| ACCOMMODATED ITEM SECURING DEVICE TYPE | SPRING CLIP |
| DISTANCE BETWEEN MOUNTING FACILITY CENTERS | 0.812 INCHES NOMINAL SINGLE MOUNTING FACILITY FIRST CENTER GROUP |
| DISTANCE BETWEEN MOUNTING FACILITY CENTERS | 2.125 INCHES NOMINAL SINGLE MOUNTING FACILITY SECOND CENTER GROUP |
| OVERALL HEIGHT | 0.188 INCHES NOMINAL |
| OVERALL LENGTH | 2.438 INCHES NOMINAL |
| OVERALL WIDTH | 2.000 INCHES NOMINAL |
| MOUNTING FACILITY TYPE AND QUANTITY | 4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY |
| UNTHREADED MOUNTING HOLE DIAMETER | 0.208 INCHES NOMINAL SINGLE MOUNTING FACILITY |
| STYLE DESIGNATOR | FLANGE HOLD DOWN |