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Mainly utilized in the photovoltaic industry, these bolts feature different threads on each end and are assembled with EPDM washers and flange nuts for secure solar panel mounting.






| Thread Size (d) | M5 | M6 | M8 | M10 | M12 | M16 | M20 |
|---|---|---|---|---|---|---|---|
| Pitch (P) | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 |
| dc (max) | 11.8 | 14.2 | 17.9 | 21.8 | 26 | 34.5 | 42.8 |
| s (nominal) | 8 | 10 | 13 | 15 | 18 | 24 | 30 |
| m (max) | 5 | 6 | 8 | 10 | 12 | 16 | 20 |
Legend: s - size of hexagon; e - diameter of circle; m - height of nut; d - nominal diameter; dc - outer diameter of ring; dw - contact surface; r - radius.
| Type | C (≤) | Si (≤) | Mn (≤) | P (≤) | Ni (≥) | Cr (≥) | Mo (≥) |
|---|---|---|---|---|---|---|---|
| SS 304 | 0.07 | 1.00 | 2.00 | 0.035 | 8.00-10.0 | 18.0-20.0 | - |
| SS 316 | 0.08 | 1.00 | 2.00 | 0.045 | 10.0-14.0 | 16.0-18.0 | 2.0-3.0 |