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            | Hexagon head screw UNF | 
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                    |  |  | BS ≈1768 ANSI ≈B18.2.1 |  |  | 
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            | Technical Parameter | 
            | | d | Threads per inch | F | A |  | No.10 | 32 | 3 | 5/16 |  | 1/4 | 28 | 4 | 7/16 |  | 5/16 | 24 | 5,2 | 1/2 |  | 3/8 | 24 | 6 | 9/16 |  | 7/16 | 20 | 7,1 | 5/8 |  | 1/2 | 20 | 7,9 | 3/4 |  | 9/16 | 18 | 9,1 | 13/16 |  | 5/8 | 18 | 9,9 | 15/16 |  | 3/4 | 16 | 11,9 | 1.1./8 |  | 7/8 | 14 | 13,9 | 1.5/16 |  | 1.IN.-12G | 12 | 15,5 | 1.1/2 | 
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            | Product Category | 
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 | Thread | Driving features | Material | Class | Surface treatment | Packaging | Code | Page |  | UNF | hexagon | St | Grade 5 | 
 | Standard | 02010 | 1-50 |  | UNF | hexagon | St | Grade 5 | Zipl | Standard | 02130 | 1-51 |  | UNF | hexagon | St.St. A2 | 
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 | Standard | 51017 | 1-51 | 
 
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