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            | Self-drilling cross recessed pan head screw | 
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                    |  |  | ISO 15481 DIN 7504M |  |  | 
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            | Technical Parameter | 
            | | d | ST2,9 | ST3,5 | ST3,9 | ST4,2 | ST4,8 |  | P | 1,1 | 1,3 | 1,4 | 1,4 | 1,6 |  | dk | 5,6 | 6,9 | 7,5 | 8,2 | 9,5 |  | k | 2,2 | 2,6 | 2,8 | 3,05 | 3,55 |  | L1 ≈ | 4,5 | 5 | 6 | 7 | 8 |  | No. cross recess | 1 | 2 | 2 | 2 | 2 | 
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            | Product Category | 
            | | Thread | Driving features | Material | Surface treatment | Packaging | Code | Page |  | ST | Phillips | St | Zipl | Large | 31250 | 6-101 |  | ST | Phillips | St | Zipl | Standard | 31255 | 6-102 |  | ST | Phillips | St.St. A2 |   | Standard | 31120 | 6-102 |  | ST | Phillips | St | Zipl | Standard | 31825 | 6-102 |  | ST | Phillips | St | Zipl | Large | 31820 | 6-102 |  | ST | Phillips | St.St. A2 |   | Standard | 31870 | 6-103 | 
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