Micro screw / electrical screw, its' tiny dimension is suitable widely in electrical products, glasses.
1. M2-0.4 length: 5mm ~ 20mm.
2. M3-0.5 length: 5mm ~ 20mm.
3. M3.5-0.6 length: 5mm ~ 20mm.
4. M4-0.7 length: 5mm ~ 30mm.
5. M5-0.8 length: 5mm ~ 30mm.
6. Inch size also available.