| EIA ELECTRON TUBE ENVELOPE ACCOMMODATED | T3 3-1 |
| ACCOMMODATED ITEM SECURING DEVICE TYPE | FRICTION FASTENER |
| DISTANCE BETWEEN MOUNTING FACILITY CENTERS | 0.300 INCHES MAXIMUM SINGLE MOUNTING FACILITY FIRST CENTER GROUP |
| DISTANCE BETWEEN MOUNTING FACILITY CENTERS | 1.200 INCHES MAXIMUM SINGLE MOUNTING FACILITY SECOND CENTER GROUP |
| OVERALL HEIGHT | 0.500 INCHES MAXIMUM |
| OVERALL LENGTH | 1.344 INCHES MAXIMUM |
| OVERALL WIDTH | 0.440 INCHES MAXIMUM |
| MATERIAL | ALUMINUM ALLOY |
| MOUNTING FACILITY TYPE AND QUANTITY | 4 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY |
| UNTHREADED MOUNTING HOLE DIAMETER | 0.098 INCHES NOMINAL SINGLE MOUNTING FACILITY |
| STYLE DESIGNATOR | IRREGULAR |