NF E25-137 Standard Dimensions for Hexagon head screws fully threaded
This norm has been cancelled
Hexagon head screws with slot, grade A - Symbol HS. This standard defines multi-drive machine screws allowing assembly-disassembly of the product via an outer hexagon or slot. These short screws are often used for reasons of difficult accessibility, or for 'general public' uses. They are infrequently kept in stock.
Dimensional Drawing and Technical Diagrams
Key Dimensions and Technical Parameters
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NF E25-137Withdrawn Dimensions in mm -hex head screws with slot Publication date: 12 - 1986 |
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| d thread size | P | k max | k min | e min | s nom | t min | n max | n min |
| M 3 | 0.5 | 2.12 | 1.88 | 6.01 | 5.5 | 0.8 | 1 | 0.86 |
| M 4 | 0.7 | 2.92 | 2.68 | 7.66 | 7 | 1.2 | 1.51 | 1.26 |
| M 5 | 0.8 | 3.65 | 3.35 | 8.79 | 8 | 1.5 | 1.51 | 1.26 |
| M 6 | 1 | 4.15 | 3.85 | 11.05 | 10 | 1.8 | 1.91 | 1.66 |
| M 8 | 1.25 | 5.45 | 5.15 | 14.38 | 13 | 2.2 | 2.31 | 2.06 |
| M 10 | 1.5 | 6.58 | 6.22 | 17.77 | 16 | 2.6 | 2.81 | 2.56 |