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the material is Carbon Steel.
hex head washer self drilling screw
| Screw Size/ Length | DIA3.5 | DIA3.9 | DIA4.2 | DIA4.8 | DIA5.5 | DIA6.3 |
| 13 | 1.34 | 1.578 | 1.964 | 2.66 | 3.585 | 4.669 |
| 16 | 1.476 | 1.773 | 2.18 | 2.933 | 3.969 | 5.158 |
| 19 | 1.561 | 1.968 | 2.392 | 3.206 | 4.353 | 5.647 |
| 22 | 1.747 | 2.164 | 2.602 | 3.478 | 4.736 | 6.136 |
| 25 | 1.883 | 2.359 | 2.819 | 3.751 | 5.118 | 6.625 |
| 29 | 2.052 | 2.587 | 3.065 | 4.024 | 5.501 | 7.195 |
| 32 | 2.202 | 2.815 | 3.318 | 4.388 | 5.884 | 7.765 |
| 38 | 2.471 | 3.206 | 3.745 | 4.933 | 6.649 | 8.743 |
| 41 | 2.568 | 3.336 | 3.886 | 5.115 | 7.033 | 9.069 |
| 46 | 2.865 | 3.662 | 4.238 | 5.569 | 7.671 | 9.883 |
Surface Treatment: Zinc plated,Cr3+, Nickel Plated
hex head washer self drilling screw