| EIA ELECTRON TUBE ENVELOPE ACCOMMODATED | T12 12-30 |
| ACCOMMODATED ITEM SECURING DEVICE TYPE | FRICTION FASTENER |
| DISTANCE BETWEEN MOUNTING FACILITY CENTERS | 1.500 INCHES NOMINAL SINGLE MOUNTING FACILITY FIRST CENTER GROUP |
| DISTANCE BETWEEN MOUNTING FACILITY CENTERS | 1.625 INCHES NOMINAL SINGLE MOUNTING FACILITY SECOND CENTER GROUP |
| OVERALL HEIGHT | 2.000 INCHES NOMINAL |
| OVERALL LENGTH | 3.688 INCHES NOMINAL |
| OVERALL WIDTH | 1.998 INCHES NOMINAL |
| MATERIAL | ALUMINUM ALLOY |
| MOUNTING FACILITY TYPE AND QUANTITY | 4 THREADED HOLE SINGLE MOUNTING FACILITY |
| NOMINAL THREAD SIZE | 0.164 INCHES SINGLE MOUNTING FACILITY |
| STYLE DESIGNATOR | RECTANGULAR PRISM |
| SURFACE TREATMENT | ANODIZE |
| THREAD CLASS | 2B SINGLE MOUNTING FACILITY |
| THREAD SERIES DESIGNATOR | UNC SINGLE MOUNTING FACILITY |
| THREAD QUANTITY PER INCH | 32 SINGLE MOUNTING FACILITY |