BS 4174 9 Standard Dimensioni per Tapping screws, cross recessed countersunk flat head
Viti autofilettanti a testa piana svasata 80° con impronta croce
Disegni dimensionali e diagrammi tecnici
Dimensioni chiave e parametri tecnici
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Dimensions in mm - source BS 4174 Table 9 80° Recess countersunk head screws, type Z: Publication date: 10 - 1972 |
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Ø thread size
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dk min
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dk max |
k nom
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t min
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t max | m nom | recess nr. | |
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ST 2.2
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3.73 | 4.37 | 1.3 | 1.19 | 1.6 | 2.4 | 1 | |
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ST 2.9
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4.95 | 5.71 | 1.7 | 1.85 | 2.26 | 3.05 | 1 | |
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ST 3.5
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6.2 | 7.09 | 2.11 | 2.26 | 2.72 | 4.22 | 2 | |
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ST 4.2
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7.42 | 8.43 | 2.54 | 2.62 | 3.07 | 4.6 | 2 | |
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ST 4.8
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8.64 | 9.78 | 2.95 | 3 | 3.45 | 5 | 2 | |
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ST 5.5
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9.88 | 11.13 | 3.35 | 3.25 | 3.71 | 6.35 | 3 | |
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ST 6.3
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11.48 | 12.88 | 3.89 | 3.94 | 4.4 | 7 | 3 | |
| ST 8 | 14.43 | 16.13 | 4.85 | 5.13 | 5.59 | 9.07 | 4 | |