19890: BRUSH,ELECTRICAL CONTACT.
This light - up learning case is designed to guide children through their first steps in writing in a fun and educational way. Children can practice their first strokes and progressively learn uppercase and lowercase letters, as well as simple words.Thanks to the self - correcting system with a light - up base, children can check if they are tracing letters correctly, promoting autonomy, confidence, and active learning. The light guides the path of each letter, supporting visual practice.The case allows for convenient storage of 21 reusable sheets, easy transport, and can be used as a surface for drawing or writing anywhere.
The set includes the light - up case, 21 reusable sheets, and a marker with an integrated eraser. Requires 3 × 1.5V C - LR14 batteries (not included). It is an ideal tool to reinforce reading and writing skills, improve hand - eye coordination, and develop concentration in a fun and educational way.
This part is cataloged in the U.S. Government catalog under NSN 5977-00-033-3644, indicating validated use in U.S. government and defense logistics supply chains.
| width | 0.310 INCHES NOMINAL IN |
| length | 0.750 INCHES NOMINAL IN |
| material | COPPER ALLOY |
| thickness | 0.248 INCHES NOMINAL IN |
| top_style | CYLINDRICAL HEAD |
| body_style | RECTANGULAR COMMUTATOR |
| seat_angle | 60.0 DEGREES ALL ENDS |
| head_length | 0.062 INCHES NOMINAL IN |
| thread_class | 3B ALL ENDS |
| belt_quantity | 7 |
| head_diameter | 0.209 INCHES NOMINAL IN |
| overall_length | 3.000 INCHES NOMINAL IN |
| NSN | 5977-00-033-3644 |
| LENGTH | 0.750 INCHES NOMINAL IN |
| TERMINAL DIAMETER | 0.250 INCHES NOMINAL IN |
| LARGEST OUTSIDE DIAMETER | 0.241 INCHES NOMINAL IN |
| BODY STYLE | RECTANGULAR COMMUTATOR |
| TOP STYLE | CYLINDRICAL HEAD |
| SHUNT POSITION DESIGNATOR | 5 |
| STYLE DESIGNATOR | ONE PIECE |
| MATERIAL DOCUMENT AND CLASSIFICATION | CARBONE CARBON GRADE AC-18 MFR REF SINGLE MATERIAL RESPONSE |
| SPRING FREE LENGTH | 1.375 INCHES NOMINAL IN |
| PRESSURE SPRING TYPE AND QUANTITY | 1 CYLINDRICAL |