| STYLE DESIGNATOR | ROUND FRAME, ROUND LENS TYPE |
| LAMP TYPE ACCOMMODATED AND QUANTITY | 1 INCANDESCENT |
| MOUNTING METHOD | PANEL |
| TERMINAL TYPE AND QUANTITY | 2 WIRE LEAD |
| MATERIAL | STEEL CORROSION RESISTING BODY |
| OVERALL LENGTH | 0.578 INCHES MAXIMUM |
| OVERALL DIAMETER | 0.250 INCHES NOMINAL |
| LAMP INDUSTRY NUMBER | 683 |
| LENS QUANTITY | 1 |
| LENS TYPE | FLAT, ROUND SINGLE LIGHT 1ST POSITION HORIZONTAL |
| LENS LIGHT TRANSMISSION CHARACTERISTIC | TRANSLUCENT SINGLE LIGHT 1ST POSITION HORIZONTAL |
| LENS FACE SURFACE CONDITION | SMOOTH SINGLE LIGHT 1ST POSITION HORIZONTAL |
| LENS BACK SURFACE CONDITION | SMOOTH SINGLE LIGHT 1ST POSITION HORIZONTAL |
| LENS COLOR | RED SINGLE LIGHT 1ST POSITION HORIZONTAL |
| TRANSMITTED LIGHT COLOR | RED SINGLE LIGHT 1ST POSITION HORIZONTAL FULL DISPLAY DIVISION A |
| PANEL ACCOMMODATION HOLE DIAMETER | 0.190 INCHES MINIMUM AND |
| 0.196 INCHES MAXIMUM |
| HAZARDOUS LOCATIONS/ENVIRONMENTAL PROTECTION | ELECTROMAGNETIC RADIATION SUPPRESSIVE |
| FURNISHED ITEMS AND QUANTITY | 1 HEXAGON NUT |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81349 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | LHC83/2RT2 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-L-3661/41 |